My 2011 Silverado 5.3 had a low oil pressure light that was. New pressure switch (that’s what the code said) made no difference. I turned the light off with my scanner and within five miles it would come back on. I added a quart of MMO and turned the light off again. 2k miles later and the light still hasn’t come back on. Oil pressure is great. MMO made a believer out of me.
I seen that before...It's Because the oil passage was restricted with carbon..So the switch was not getting the correct pressure reading.. I seen people change oil pumps. Only to find that out..
Something I want to leave under this comment but it's not pertaining to this continent is this Give the channel a chance and the knowledge that's being put out here before shooting stuff down please that's all I ask of you. A lot of people coming with their biased opinion and I would like for you to let me as a neutral Force dispel some of the myths and or show if a product actually works As a master technician in the field that does this every single day for a manufacturer I would think that people would want to see what I have to say about this without shooting the product down and trashing my testing methods and just let me do my thing and hang around for it
Nice I have a 5.3 too. Pretty nice engines. For a while I had a CEL p0446 code for EVAP leak. Oh boy...tons and tons of advice on the internet, replace this, clean the filter, replace the tank pressure sensor, tap on the charcoal filter...everyone had some solution I didn't know what to try first but of course wanted to try the simple easy stuff first. Ended up noticing the fuel cap was pretty dirty and where it screwed into the filler neck. Cleaned up the gas cap and where it sits on the filler neck, cleared the code and it hasn't come back since!
Yes! My first old truck 2004 3V, f150, after getting night mare spark plug issue addressed, noticed my oil pressure gauge was flickering, i was stressed out, being broke, stop by autozone, remember talking to the guy behind the counter, the guy asked me to try MMO, never heard of it before, dumped the whole can. immediately oil pressure went up. Never saw it again .
@@cessealbeach I just had a Dodge Promaster 2017 roll up not 30 mins ago..Everybody wanted to replace the AC compressor... It's the damn cooling fans stage 3 will not come on. So the ECM shuts the AC off too protect it from overheating...10 mins of looking they have a recall that replaces the Cooling fans. The resistors and 6 relays for free. As it's a fire hazard.. Guy was happy as could be. He saved $900.00 for an AC compressor job.. And them fans. As they cost $450.00 from Dodge dealer. then labor added in.. All because I typed in the guys VIN to check on issues with stage 3 fan not coming on..Seem a common issue with that model..
I worked for a car dealer as a mechanic a long time ago and that is how I caught on to Marvel Mystery Oil. When we had a vehicle that had valve chatter he would buy the M.M.O. and put that in and by the next day that valve clatter was gone. I always recommend it to my customers who have valve clatter issues and a dirty oil control system. At least 50% of the vehicles I work on have dirty or very little oil in the engines. This is the truth. M.M.O. really works.
A friend of mine bought a Pontiac Lemans...it had terrible lifter noise. As an experiment we poured a little MMO into the oil while it was running (made a bit of a mess because of the blow-by) and in 15 secs the lifters were absolutely quite...made me a believer!
MMO is still on the market because it’s still a viable product in certain circumstances. It’s not going to fix everything, but loosening up a top end and moving throughout an engine to help circulate oil better is probably it’s best thing in addition to cleaning out fuel systems on old engines.
Years ago worked with an old timer who know so many great tricks of the trade. He would add marvel mystery oil think it was 50 to 100 miles before his 3 month or 3000 miles whatever came first. He purchased the car new and had well iver 150 K miles on it. Have not seen this in the stores in a while.
@@garbo8962 maybe look for it. I know it's still out there. I think it's being overshadowed by some of this new whiz-bang stuff but i think its still the best for what it does.
Their air tool oil is tacky, clogs mine up. It smells like paintballs, or corn syrup etc. It's not straight marvel. REAL marvel once a week is probably not a bad idea if I'm using their DIFFERENT tool oil. I may try plain marvel next time.
This is a very fair and honest review Being a retired bmw tech and being ase certified,I appreciate your attention to detail,the questions I was asking you actually had answered My dad used to use it all the time,his vehicle always ran great,I used to think it was snake oil,but he always put some in the gas,some in the oil,,he made me a believer
We leased a farm from an old man. He made a drip system for marvel mystery oil to drip over the valve train of an old Moline well engine. Engine was made in 1947. Still runs today pumping water and has never been rebuilt.
I have used Marvel Mystery Oil in all of my vehicles since the early 70's. I add it to my oil, every other oil change. I also add it to my gasoline every 5th tank full. It keeps my engines free of sludge and keeps my valves and lifters quiet. It also keeps my fuel injectors clean. It is a great product!
Please explain why you add MMO to "every other oil change" instead of every oil change. And why not to every gas fill up--or every other fill up or every 3rd, 4th fill up. How did you arrive at the 5th fill up? I use it continually with no problems whatsoever.
@@barrygrant2907 Hi Barry, I basically use MMOil when varnish deposits typically start. You don't wash a car when it is clean; and I treat the car with MMOil accordingly. Fuel injection is pretty much the same way. I've used this approach for many years and I have been very pleased with MMOil. It is the only oil and fuel additive I use.
Never used it myself but, a friend's dad was an old school mech for years and knew his stuff. If someone brought him a vehicle with a lot of miles and or dirty, sludgy internals he would do an oil change and sub 1 quart of oil for MMO and have them drive it for about 3 weeks or so and bring it back. I have seen it really clean the valve train and quiet down a tired engine. He always swore by this stuff.
My truck has over 240k miles and needed a good flush. I ran a 40% mix in my truck for 400 miles and changed the oil. It came out super black from all the varnish and sludge it broke down. Now I'm running it consistently at 20% mix. It's still cleaning out the engine as I keep noticing improvements in how the engine is running.
Marvel mystery oil motor magazine 1929 new product WW2 used top cylinder lubrication for fighter planes special tank with mmo was injected into intake Used as cutting oil great Grandad Machine shop opened 1933 Still used to current 2021 I use in all vehicles as lead substitute in older vehicles in fuel Mix and additional oil in 2 cycle mix . Great for stuck valves Great product just use quality oil Filters like wix or Napa Gold A/c Delco, Motorcraft. .. never never Use Fram oil filters they come apart .internally stop up everything. Had a customer with 2.3 low compression readings .. used mmo Full oil change cycle engine runs better readings on compression And engine running better . Apparently rings sticking due to short trip cycles .. I am currently bringing a ford 351 out of hibernation using mmo sticking valves and rings pouring some in intake and filling cylinders all plugs out . Let soak few days .truck has 22k original miles like new . This is great stuff for my 50 mercury and 1949 - 52 ford Ford trucks with flathead engines You have great videos thanks
Bought my 2003 GMC Sierra used which had 220,000 km. The old 5.3 had a pretty noticeable lifter tick in it. Threw in some mmo and drove for 10-15 minutes and the noise was completely gone- I couldn’t believe it. I drained the oil and it was dark as it could possibly get. Obviously the truck wasn’t maintained and had a lot of build up in it. Been putting abit of mmo a couple Kim’s prior to an oil change for the last 4 years. Truck now has 325,000 km and it’s completely silent and runs great. Also throw some in the gas occasionally. True believer in this stuff
Me too. I've had the same experience with an old 2000 Sierra. It now has 365k miles and running strong. It has the 6.0. I still get 15 mpg + with it. Love the truck and my MMO.
if you plan on going a full 3,000 miles or so with the marvel you might want to consider changing the filter halfway through. all the sludge and carbon its cleaning is going to get Trapped in the filter
I've have worked on several high mileage cars over the years. The biggest improvements I've seen is from cars that used Conventional Motor oil. Even if they change their oil regularly, it will still gum up and sludge a bit. Then I would run a can of high detergent engine flush and drain. I would repeat in severe cases. When I was satisfied with the results, then I would switch to 100% synthetic oil. The engine now would run sewing machine smooth. Then to assure maximum cleaning, I would run 1 or 2 cans of Seafoam via a vacuum line. This would help further clean the intake/exhaust valves, and cylinder heads. Ofcourse, in highly neglected cars, cleaners will only go so far. Mechanic in a Can will not fix a worn or damaged engine.
5 years ago I bought a 2004 chev 2500 with a 6.0L gas engine it was 400 miles from where I live. When we picked it up it seemed really sluggish and lacked acceleration, when we filled with gas to head home I dumped 2 quarts of MMO in with 25 gallons of gas after 100 miles I could already feel the difference the engine had more power and ran a lot smoother. I continued to add MMO when we filled with gas at 1 ounce per gallon until we arrived home, what a difference in power and overall smoothness. I continued to add MMO to the gas all the while I owned that truck, never had a problem with the engine sold the truck with 180,00 miles on it, new owner loves it. I add MMO to all my vehicles at fill up now at 1 ounce per gallon.
5.4L 405k miles. Runs smooth as silk. Original motor, trans, starter, etc. Not babied. But gets its MMO snack several times a year. Added to oil & gas. Great product.
Been buying MMO for years. Put it in my oil and gas. Was $3.88 for years. Now that everyone talks about how cheap and good it works. Yesterday it was $5.88. $2.00 increase. Still cheaper than most and still works good. Shawn.
I have used MMO to clean up a dirty engine. It does an excellent cleanup job. Since I have been running full synthetic, I see no need to do that. I do add 16 0z. to the gas tank now and then to keep the fuel system clean. I have added it to oil of friends and family who have sticky or tapping valves. The noise goes away almost immediately.
Quick 2 cents, backyard mechanic here, I had a crazy P3400 code on a used 2006 Dodge Ram 1500 I purchased. Cylinder deactivation bank1 , truck was wore out so I changed plugs all 16, filters, new coils, Changed with Mobil 1 twice with no luck, re setting the light it came back in less then 10 miles.old heads swear by this stuff so with the light on and the same oil I removed one quart and put a bottle of this in. Within 20 miles light went out and never thrown the code again. 500 miles later I’m about to drop it out, 6 quarts of Mobil 1 and one quart of MM will be my set up for now on and any car I get I’ll substitute a quart of oil for a quart of MM. I still cant believe it!
I'm in the MMO believers club, been using it for about 40 years. I put a half a quart or so in the crankcase about 300 miles before an oil change and 4oz or so in the gas tank at fill up. Never a problem here and I've owned a couple dozen cars, a few I held for 10+ years.
It's interesting to see the changes you're noticing in the engine. I'm glad that you have an oil pressure gauge so that you can be sure the pressure hasn't dropped too much.
i have 40 year old air tools that other than an occasional mercon II rinse have never had anything but Marvel Mystery Oil in them. recently my AT-450 grinder digested a check-ball from an exploded coupler and had to come apart and it was sanitary clean inside. pneumatic specialist beside me said he'd seen 90-day old tools with more sludge than my old snap-on workhorse had.
Lots of discussion on bobisyheoilguy on this topic. MMO has its place. I've used it a long time for all sorts of things, including cleaning up an engine. I don't use it in gas for vehicles anymore. I use Lucas for that or 2 stroke. It's mostly naptha oil with wintergreen oils for smell. It's a light solvent. Some guys will put it in the engine the last 100-500 miles of an oil change when cleaning things up. I'd also recommend HDEO diesel oil. Maybe go with a thicker grade and substitute a quart of MMO with it.
I've always been careful using MMO or Seafoam in the bottom end. They knock loose a bunch of crap and they'll clog up pick ups and filters if the motor is really sludgy.. They are also such strong solvents that I worry about starting leaks. That being said, nothing works better than MMO mixed in your gas tank. Early throttle body fuel injectors really responded to that stuff. I've also had good luck mixing just a little in with 2 cycle fuel. It brought an old Yahmaha's oil injector back from the dead.
For years Plant Mechanics had been using MMO in the Plants Air oilers for service air lubrication for pneumatic actuators, It was eventually found out the MMO was the culprit for all of the extra work in replacing every o-ring in all of the pneumatic actuators throughout the Plant... MMO attacks Buna-n Material...
I bought a 1994 Ford explorer V6 with 99150 miles on it and hadn't ran in six years. I pull the fuel tank put a pump assembly, pulled the intake manifold and installed all new injectors. The oil was brand new in it from when it was parked. My neighbor Tom was over when I first started the engine. It cranked up clattering and knocking loudly. Instantly turned it off. Tom asked what are you going to do? I said I am going to Walmart and buy a quart of Marvel Mystery oil. He said I have a quart in my building next door, I said I will give you 10$ cash if you go get it. He went and got it. I poured it in on top of the oil that was in it. I cranked it up and within 15-25 seconds that engine went totally quiet and smooth. Old Tom said you know I would never believe it if I had not heard and seen it.. I have been using it for 40 years. I have many other stories about it. You too will soon be a believer.. Good day sir, nice to comment to a actual mechanic...
The marvel mystery oil is the bomb it really really works if you use it on a really chunky dirty motor. It will plug up the filter fast so change the filter twice while the mystery oil is in there. Do it for a couple weeks and really run the motor while you have the mystery oil in for those two or three weeks and it will really clean it good. I believe it is like a diesel and somethile else mix (mystery oil)
Also I read a forum somewhere that it was a diesel type oil with some type of peppermint oil or something like that in it idk. It does smell tastey though
I've added MMO to my 69 Ford F-100 since the 70s, it works fantastic. About 8-9 years ago l decided to replace the 302 V8 with a 300 6 , l was somewhat undecided mainly because the 300 6 had over 100k mis. on it. But the 302 was tired, and the 300 6 had also been run its entire life with MMO in both the motor oil and in fuel. So.... before dropping in the 300 6, l opened up the 300 6 , valve covers and oil pan only, cause l didn't want to have to pull out again the 300 if it was bad, although it was running great. I was stunned by how clean it was on the inside! It had a yellowish gold color to the inside. I have pictures to prove my claim. Then l opened up the discarded 302 V8 and it too was fantastically clean, but it had several 100K mis. on it. I was amazed by how clean it was too. The 300 6 runs so smooth one of my friends thought l had converted my 69 to fuel injection! So yeah MMO does a great job of keeping a motor clean and l mean everything. My oil pressure before MMO was very high, now it's lower because of MMO viscosity. On the fuel side the carb. off the old engine was also very clean. MMO is one of the best investments l have made. And no I'm not a MMO rep.
It's counter intuitive but dad had me using it for assembly lube on engines he rebuilt in his shop in the 70s.I just did as told being a kid . Never a problem.He also had customers asking about losing head gaskets until he fixed it .Back then he was painting the head gaskets with aluminized paint.Those old guys have their secrets
An old mechanic I worked with use to use wheel bearing grease on head gaskets. He never had one come back on him, but this was before EFI so today's coolant temp sensors probably wouldn't like wheel bearing grease lol.
TSB 09-003-03 is the Technical Service Bulletin for my '03 jeep Wrangler with the 4.0 engine. I had the misfire issue almost since new (I ordered this Jeep from the factory). The dealers were not much help and did a lousy job following the TSB the last time I let them touch my Jeep. I now have 100k miles. About every 5k or longer the engine will get a slight miss (manual transmission) that I can feel but will not set a Check Engine Light. At about 20k miles and 3 dealerships I started using MMO and have never looked back. I am at 101k and currently using it again. I suspect deposit buildup on the exhaust valves which keep the valves from closing at times. That TSB may help solve part of the engine misfire that you are experiencing. BTW, the gas mileage dropped 1-2 mpg and now it is back up at 18-19 highway which is good for a stock Rubicon. It takes about 2 full tanks of gasoline with MMO. BTW I tried all the injector cleaners and high detergent gasolines with no success. MMO is a cheap fix and does not seem to affect the catalytic converters.
My 94 k2500 has maybe 150k on the engine/297k on the truck, developed a random loud valve train noise about a year ago. Would come and go with nothing for weeks. Replaced a suspect lifter, readjusted all rockers. Came back randomly still. Always ran synthetic 10w-30/5000 mile interval. Oil pressure would be near redline at idle hot, and at 2500rpm still alarmingly low….. sometimes. Gave her the old ATF treatment and MMO for two short oil change intervals, and it stopped. It’s had a knock only for a second after start up for a few years, so I’ve been running Rotella 15w-40 T6. That’s the flavor she likes and is still running fine. Also switched to wix filters from acdelco.
I have NEVER seen a negative comment about MMO. It is easily 50 years old and consistently a very good seller. Use it note any changes in your vehicle.
35 years ago when I first started using mmo the label use to read "will make your engine run like new indefinitely" I use it in the fuel in all my air cooled engines, also in stored fuels. I sware by the stuff.
I always added 1/2 quart of MMO to every oil change on my Chevy truck. I now have a Tacoma. I will begin doing the same thing with that truck also. Plus some in a full fuel tank.
It's pretty interesting that an old product that's been around for years and years and years is working that well and PS I just got paid to watch this video got to love waiting on concrete
I've been using MMO since the 80's. We lived on a farm, and the old man down the road showed me how he used it. He put it in the oil of all his equipment, in the fuel tanks and he'd use it to clean parts. He would buy it in bulk. I've used it in old cars that I would pick up to take to the scrap yard when ppl told me the car didn't run anymore. After a new battery, oil, fuel and coolant flush, I'd add this to the oil and fuel, and believe it or not they'd run smooth. But I have seen this clean so well that the sludge cleared around gaskets/seals, they'd leak even more. But that's OK, I'd gladly replace a few gasket set and sell a running engine than scrap the entire car.
I've always liked MMO plus it's usually cheaper than buying a quart of oil and since most of my vehicles take 6 quarts, it's usually most economical for me to buy a 5 qt bottle of oil plus 1 MMO
Looking promising so far. I think I'm going to pick up a bottle of this stuff and dump it in my Crown Vics crankcase. The engine's got an annoying racket that shows itself on random cold starts. Lasts for just a couple seconds then goes away. I've had people say it was the timing chain guide sticking. A friend of the family who regularly works on cars heard it and he said it was a sticking lifter or valve. It's a loud tapping noise. After it stops, there's a noticeable ticking/clicking noise that ends up going away within a minute or 2. This was a former county sheriff's car so it has a bunch of idle hours on it. Engine runs strong otherwise.
Had an old dodge colt.had a stuck valve.sounded like a bee w/broken wing high idle low idle. Treated two tank fulls w/ marvel 423 miles later idled smooth all the time.
Well I’ll tell you my take on Marvel mystery oil for A different application I had some stuck bearings in a spindle shaft from a tractor had it and a 20 ton press , Sprayed everything on it could not get it to move I work with this thing for an hour trying to save the shaft because it was expensive I didn’t wanna have to buy a complete spindle assembly had it under pressure with all the pressure I could give it without breaking it in the press in my last resort was pump. The mystery oil down the shaft on the bearings went to lunch came back and the thing was loose and in pieces so I really believe in it because I tried for an hour with all kinds of stuff and could not get that shaft out of those bearings I believe in Marvel mystery oil, and I’ve had some really amazing things with PB blaster with tie rods ,front end rebuild , sprayed them & tapped with hammer ,f350 , things just came apart like butter the next day which was amazing
My Dad always had good things to say about MMO, he used it when he owned his own small garage. The only thing I noticed on a bottle of it was anything with a catalytic converter you don't want to use it as a fuel treatment.
@@johnhill8958 yep, I've been using it in all 4 of my cars for 7 to 8 years. Every drop of fuel that goes in them will have MMO. Not one problem. Several 100,000 miles between them all. Someone on TH-cam did a burn off test of fuel additives and I believe MMO was the cleanest or close to it.
The smooth running engine is the result of reduced friction between the pistons and the cylinder wall. MMO cleaned out the carbon from your piston rings.
This reminded me I really should pick up a quart and add it to my 2011 Ranger 4.0 V6. About 145K miles. It has a bit of top end clatter when it's cold and I've noticed reduced power and fuel economy.
Update, I added a quart. By the time I got home that day, 100 miles in, the top end noise is mostly gone. Seems to have more power. Seems to be working!
Use it a lot back in the 1970s I always thought it was just regular transmission fluid because it looked like it, and smell like it, it acted like it! But hey it worked!
I saw some camshafts back in the 60's that came out of marvel mystery engines the parts were polished to mirror finish but were out of spec, no doubt dirt had been suspended in the oil but the filters at that time wouldn't filter damaging particles out. That's all changed with modern premium filters
I've never used mmo but I have been told it takes about 300 miles to properly do the job I've had good success with the liquid molly additive looking forward to the full results
MMO is good for loosening carbon off of the rings. I suspect that you're getting more power because of that. I've always used it and had good results. My Durango has 240K on it and it runs great.
Shop I worked for sold a used motor job. Vheap swap.. No add-ons or even pulling the oil pan.. I was against it but I'm just a tech so I changed the motor. 4.0L Ranger. Start up it rattled like hell!! I changed the oil 3 times with ATF to clean it out. I'd let it idle for a hour and change it. Drain it and do it again. I finally got it to quiet down enough that I felt confident enough to let the customer take it. It never came back much to my surprise....
I bought a 2019 4Runner and everyone said the newer V6 Motors clatter on Startup and there's nothing that could be done about it I put a half a quart of Marvel Mystery Oil in the car the next morning reduced clatter the following week no clatter at all Marvel Mystery Oil Works always has
I just dump the whole bottle in my gas tank every once in a while. It cleans out the fuel injectors, decarbonizes the piston tops, and provides additional lubrication to the fuel pump.
Excellent for diesels too for a fuel additive, normally I have to clean my DPF filters every 2yrs. It's been three on this truck and my ash count is still above 90% free.
Whenever you thin out your oil you'll always get slightly noticable improvement. This is why a lot manufacturers switched from 5w30 to 5w20. That minor switch is the difference between 3 to 5mpg improvement.
Used to also use MMO in old, large, radial, aircraft engines that had been dormant for long periods to free up rings, etc, with great results (shhh.... not approved...).
Way better than Mobile 1! I remember in the 80s using Mobile 1 and blowing oil seals. Finally realized the culprit was the oil. Told one of the mechanics who taught me to wrench about it and he told me of small craft pilots who used it suffering oil leaks in flight. Sucky way to product test and I've never touched the stuff since.
My dodge had a stuck/sticking lifter and would make all kinds of noise I ran mmo and the noise went away the sludge was so bad after I had to pull the oil pan and valve covers to clean it. After mmo the engine came to life and ran great. I got 130k plus miles outta that truck and sold it and that guy is still driving it. It had over 330k when I sold it today it's over 400k original engine and trans only rebuilt once
Use it all of your small gas engines a little in you chain saw the Quilty of gas sucks right from the pump with no shelf life. I don't have carb problems anymore. I also use it to lube rifle cases when I resize them when I am reloading. Just a pinch on your fingers works.
Oh yeah. Like the first impressions video. Another comment made me think : it would be cool to take apart the filter when you change the oil to see what the filter media looks like even compared to a random regular oil change of any vehicle of similar oil viscosity
@@FordBossMe awesome! I'm going to run it in my 96 powerstroke about 2 weeks before I change the oil and see what it does. The truck is running good now but has sat for 3 years. Almost ready for the road again
ATF will not do the same job as MMO. Anytime we had stuck valve problems we would cure them with MMO and of course remove all the old gas that caused the problem replacing it with fresh gas. Bardahl oil products also work well under extreme engine ues conditions.
Adding any kind of petroleum based cleaning fluid to engine oil will do some cleaning. The oil appears a lot cleaner on a dip stick than it does in an oil drain pan.
I remember putting Slick 50 in my little D-50 Dodge 4-cylinder truck back in the late 80's, with the hope of more power and better MPG. Made it leak oil from every seal and gasket. It was then that I swore off engine snake oil solutions.
Mmo is basically just kerosene like diesel or no1 fuel oil (all pretty much the same thing) and a bit of naphtha oil with mint scent The naphtha and diesel is a strong cleaner and it does thin the oil but thinner oil makes an engine spin with less resistance. That's why drag racers use literal 0 weight oil. Yes mmo works but so does pura naphtha and diesel either by themselves or mixed together. Mmo was known as snake oil not because it didn't deliver but because it's two cheap things you can mix together masked by a minty smell so people couldn't smell the two things. I don't buy mmo but I do use naphtha and diesel in oil. I do it every few years as a maintenance cleaning in my trucks. Some people use it regularly but it's a waste. Oil even if changed frequently will still make a bit of varnish but it takes years and one shot does the trick. Cleanest 300k valve covers and I do 10k oil changes with cheap syn.
I don't really think that's 100% true because it does have like extra fuel base to it that transmission fluid doesn't have and it's so much thinner than transmission fluid
Base component is Stoddard solvent. Get the MSDS sheet and look at it. Although they are not required to identify "proprietary trade secret" compounds.
Should have done a compression test before and after, MMO could be removing/dissolving crud in the piston ring grooves/lands... I've used Rislone flush running and Berryman chemtool for static flush (Oil Pan Off) with great success
@@FordBossMe I see no nits to pick..Lol.. When I did the flush as stated above, I noticed a 20psi (dry) increase in cyl psi with an evening out across all 6 cyl..jeep 4.0.. the motor had been a victim of short drives below operating temp, it was sludged up like chocolate pudding with tons of varnish.. eventually I had to replace the lifters, which lead to replacing the cam, which lead to replacing the cam chain and oil pump which lead to might as well do a valve job... It had 185k at the time, now it has 623k on the OEM rings and bearing...
This stuff worked for me once. Than my car caught on and demanded more fancy crap. Now i use liquimoly oil, and lifter additive and ceretec. Oil temps dont hit 190 in 110 degree weather beating the crap outta the throttle, and the valvetrain soundtrack has been muted. Only downside is playing scientist with a measuring cup. 7 times 🤣
I noticed the same power bump with my 05 Mitsubishi Lancer. (2.0 N/A) Did an oil change with 20% MMO and it became more responsive. The car burns oil like nuts (nothing can fix 190k mile piston rings) but it runs like a clock as long as I don’t let it run low
Some years ago I read a technical analysis breakdown of the components in MMO. Mostly petroleum distillates (solvents) with a light lubricant added. Don't remember all the chemical breakdown but no real mystery. Way back when (way, way back) there was a product on the market that would do the approximate thing that MMO would do, it was called Rislone. Another old timers trick: Back in the late 50s & early 60s a lot of cars would develop sticking hyd. lifters creating a noticeable clicking noise. The mechanic would put in a quart of ATF & have the owner drive it for about a 1000 miles then change the oil. Worked about 80% of the time. If it works then use it.
@@christianmotley262 Yeah there were products that had instructions to do something like that. There was one that had a complete system that metered some sort of product into the intake manifold. It was supposed to provide upper cylinder & valve lubricant. The stuff was put into a glass container under the hood & attached to a bunch of plumbing that was attached to the intake system somehow. I have only seen one actually installed but had seen ads in car magazines back then.
@@christianmotley262 Yeah, there were a lot of shade tree fixes back then. To break free the carbon deposits on valves they would pour water out of a Coke bottle into the carb on a running & hot engine. The ATF thing was real & it did make a bunch of smoke. There were other products that suggested that you poor their concoction into a running engine. I have no idea if any of the fixes worked.
@@hosslane320 I started using Motorkote products for about two years now..& I can honestly say my engines Ford 6.8 Triton GM 2.2 Ecotech & GM 2.2 Vortec have increased MPG & smoother quiet idle.
Hi Rich. Would you agree, that if the engine was properly maintained with regular oil changes. That this mmo would not be necessary. Thanks the old school guy.
Yes I do agree with that statement but at the same time it could actually help any future varnish or build up just as a preventative with the oil like maybe 3 or 4 ounces only
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My 2011 Silverado 5.3 had a low oil pressure light that was. New pressure switch (that’s what the code said) made no difference. I turned the light off with my scanner and within five miles it would come back on. I added a quart of MMO and turned the light off again. 2k miles later and the light still hasn’t come back on. Oil pressure is great. MMO made a believer out of me.
I seen that before...It's Because the oil passage was restricted with carbon..So the switch was not getting the correct pressure reading.. I seen people change oil pumps. Only to find that out..
Something I want to leave under this comment but it's not pertaining to this continent is this
Give the channel a chance and the knowledge that's being put out here before shooting stuff down please that's all I ask of you.
A lot of people coming with their biased opinion and I would like for you to let me as a neutral Force dispel some of the myths and or show if a product actually works
As a master technician in the field that does this every single day for a manufacturer I would think that people would want to see what I have to say about this without shooting the product down and trashing my testing methods and just let me do my thing and hang around for it
Nice I have a 5.3 too. Pretty nice engines. For a while I had a CEL p0446 code for EVAP leak. Oh boy...tons and tons of advice on the internet, replace this, clean the filter, replace the tank pressure sensor, tap on the charcoal filter...everyone had some solution I didn't know what to try first but of course wanted to try the simple easy stuff first. Ended up noticing the fuel cap was pretty dirty and where it screwed into the filler neck. Cleaned up the gas cap and where it sits on the filler neck, cleared the code and it hasn't come back since!
Yes! My first old truck 2004 3V, f150, after getting night mare spark plug issue addressed, noticed my oil pressure gauge was flickering, i was stressed out, being broke, stop by autozone, remember talking to the guy behind the counter, the guy asked me to try MMO, never heard of it before, dumped the whole can. immediately oil pressure went up. Never saw it again .
@@cessealbeach I just had a Dodge Promaster 2017 roll up not 30 mins ago..Everybody wanted to replace the AC compressor... It's the damn cooling fans stage 3 will not come on. So the ECM shuts the AC off too protect it from overheating...10 mins of looking they have a recall that replaces the Cooling fans. The resistors and 6 relays for free. As it's a fire hazard..
Guy was happy as could be. He saved $900.00 for an AC compressor job.. And them fans. As they cost $450.00 from Dodge dealer. then labor added in..
All because I typed in the guys VIN to check on issues with stage 3 fan not coming on..Seem a common issue with that model..
Ford Boss Me , must have long days , works all day ,then spends the rest of his night reading comments and replying to them , THANK YOU SO MUCH Rich.
I worked for a car dealer as a mechanic a long time ago and that is how I caught on to Marvel Mystery Oil. When we had a vehicle that had valve chatter he would buy the M.M.O. and put that in and by the next day that valve clatter was gone. I always recommend it to my customers who have valve clatter issues and a dirty oil control system. At least 50% of the vehicles I work on have dirty or very little oil in the engines. This is the truth. M.M.O. really works.
A friend of mine bought a Pontiac Lemans...it had terrible lifter noise. As an experiment we poured a little MMO into the oil while it was running (made a bit of a mess because of the blow-by) and in 15 secs the lifters were absolutely quite...made me a believer!
MMO is still on the market because it’s still a viable product in certain circumstances. It’s not going to fix everything, but loosening up a top end and moving throughout an engine to help circulate oil better is probably it’s best thing in addition to cleaning out fuel systems on old engines.
It's fantastic stuff. I have unseized a few engines with it over the years. Treat fuel, treat oil, unstick lifters etc. Its my go to for many things.
Years ago worked with an old timer who know so many great tricks of the trade. He would add marvel mystery oil think it was 50 to 100 miles before his 3 month or 3000 miles whatever came first. He purchased the car new and had well iver 150 K miles on it. Have not seen this in the stores in a while.
@@garbo8962 maybe look for it. I know it's still out there. I think it's being overshadowed by some of this new whiz-bang stuff but i think its still the best for what it does.
@@spacecat7247 Thanks.
That Marvel is great stuff. Been using it for DECADES. It really cleans up the engine innerds!!! There's always a jug in my garage!!!!!!
Been my go to snake oil for 40+ years, great for sticky lifters
Yes
Sticky lifters and air tools.
DC: I've used MMO to free sticky valves on aircraft. The airlines used to buy MMO by the barrel for use on radial engines.
Their air tool oil is tacky, clogs mine up.
It smells like paintballs, or corn syrup etc. It's not straight marvel.
REAL marvel once a week is probably not a bad idea if I'm using their DIFFERENT tool oil.
I may try plain marvel next time.
Diesel if MMO won't free em
I have never seen a day by day review of any engine product. Hopefully you start a new trend!
That's what I'm shooting for here
I took a tablespoon of this stuff and I’m no longer constipated.
It also makes for a great fleet enema. just insert the bottle neck and squeeze
🤣😂😬🥺
@@davidjames666 I'm sure your brain needs it
@@michaelj1232 as you know, it doesn’t cure your erectile dysfunction either
No shit! LOL
I was one of the people asking about what to use to clear up sludge from the previous owners. Thanks for giving a damn about our sludge lol
This is a very fair and honest review
Being a retired bmw tech and being ase certified,I appreciate your attention to detail,the questions I was asking you actually had answered
My dad used to use it all the time,his vehicle always ran great,I used to think it was snake oil,but he always put some in the gas,some in the oil,,he made me a believer
We leased a farm from an old man. He made a drip system for marvel mystery oil to drip over the valve train of an old Moline well engine. Engine was made in 1947. Still runs today pumping water and has never been rebuilt.
I have used Marvel Mystery Oil in all of my vehicles since the early 70's. I add it to my oil, every other oil change. I also add it to my gasoline every 5th tank full. It keeps my engines free of sludge and keeps my valves and lifters quiet. It also keeps my fuel injectors clean. It is a great product!
Please explain why you add MMO to "every other oil change" instead of every oil change. And why not to every gas fill up--or every other fill up or every 3rd, 4th fill up. How did you arrive at the 5th fill up? I use it continually with no problems whatsoever.
@@barrygrant2907 Hi Barry, I basically use MMOil when varnish deposits typically start. You don't wash a car when it is clean; and I treat the car with MMOil accordingly. Fuel injection is pretty much the same way. I've used this approach for many years and I have been very pleased with MMOil. It is the only oil and fuel additive I use.
Marvel is what I used to free the stuck rings in my LS before it was rebuilt. Nothing else would touch it.
Never used it myself but, a friend's dad was an old school mech for years and knew his stuff. If someone brought him a vehicle with a lot of miles and or dirty, sludgy internals he would do an oil change and sub 1 quart of oil for MMO and have them drive it for about 3 weeks or so and bring it back. I have seen it really clean the valve train and quiet down a tired engine. He always swore by this stuff.
Any oil additive that smells like candy has to work!
Great update!!
My truck has over 240k miles and needed a good flush. I ran a 40% mix in my truck for 400 miles and changed the oil. It came out super black from all the varnish and sludge it broke down. Now I'm running it consistently at 20% mix. It's still cleaning out the engine as I keep noticing improvements in how the engine is running.
This interesting I’ve done 20% but I’m tempted to do this in my 2005 Acura TL
Marvel mystery oil motor magazine 1929 new product
WW2 used top cylinder lubrication for fighter planes special tank with mmo was injected into intake
Used as cutting oil great Grandad
Machine shop opened 1933
Still used to current 2021
I use in all vehicles as lead substitute in older vehicles in fuel
Mix and additional oil in 2 cycle mix . Great for stuck valves
Great product just use quality oil
Filters like wix or Napa Gold
A/c Delco, Motorcraft. .. never never
Use Fram oil filters they come apart .internally stop up everything.
Had a customer with 2.3 low compression readings .. used mmo
Full oil change cycle engine runs better readings on compression
And engine running better . Apparently rings sticking due to short trip cycles .. I am currently bringing a ford 351 out of hibernation using mmo sticking valves and rings pouring some in intake and filling cylinders all plugs out . Let soak few days .truck has
22k original miles like new .
This is great stuff for my 50 mercury and 1949 - 52 ford
Ford trucks with flathead engines
You have great videos thanks
Bought my 2003 GMC Sierra used which had 220,000 km. The old 5.3 had a pretty noticeable lifter tick in it. Threw in some mmo and drove for 10-15 minutes and the noise was completely gone- I couldn’t believe it. I drained the oil and it was dark as it could possibly get. Obviously the truck wasn’t maintained and had a lot of build up in it. Been putting abit of mmo a couple Kim’s prior to an oil change for the last 4 years. Truck now has 325,000 km and it’s completely silent and runs great. Also throw some in the gas occasionally. True believer in this stuff
Me too. I've had the same experience with an old 2000 Sierra. It now has 365k miles and running strong. It has the 6.0. I still get 15 mpg + with it. Love the truck and my MMO.
if you plan on going a full 3,000 miles or so with the marvel you might want to consider changing the filter halfway through. all the sludge and carbon its cleaning is going to get Trapped in the filter
I'm monitoring that I got it
You dare question his intelligence?
or clog the oil pump pickup
Whatever's in MMO (used to be oil of wintergreen) can also flash off some from engine heat, so dont be surprised if oil level drops a little.
@@billybullfrog ,The MMO breaks down the sludge and grime, so I've never had that problem.
I've have worked on several high mileage cars over the years. The biggest improvements I've seen is from cars that used Conventional Motor oil. Even if they change their oil regularly, it will still gum up and sludge a bit. Then I would run a can of high detergent engine flush and drain. I would repeat in severe cases. When I was satisfied with the results, then I would switch to 100% synthetic oil. The engine now would run sewing machine smooth. Then to assure maximum cleaning, I would run 1 or 2 cans of Seafoam via a vacuum line. This would help further clean the intake/exhaust valves, and cylinder heads. Ofcourse, in highly neglected cars, cleaners will only go so far. Mechanic in a Can will not fix a worn or damaged engine.
... So what does all that have to do with MMO, which is the topic of the video ?
5 years ago I bought a 2004 chev 2500 with a 6.0L gas engine it was 400 miles from where I live. When we picked it up it seemed really sluggish and lacked acceleration, when we filled with gas to head home I dumped 2 quarts of MMO in with 25 gallons of gas after 100 miles I could already feel the difference the engine had more power and ran a lot smoother. I continued to add MMO when we filled with gas at 1 ounce per gallon until we arrived home, what a difference in power and overall smoothness. I continued to add MMO to the gas all the while I owned that truck, never had a problem with the engine sold the truck with 180,00 miles on it, new owner loves it. I add MMO to all my vehicles at fill up now at 1 ounce per gallon.
5.4L 405k miles. Runs smooth as silk. Original motor, trans, starter, etc. Not babied. But gets its MMO snack several times a year. Added to oil & gas. Great product.
Been buying MMO for years. Put it in my oil and gas. Was $3.88 for years. Now that everyone talks about how cheap and good it works. Yesterday it was $5.88. $2.00 increase. Still cheaper than most and still works good. Shawn.
My father taught me the Marvel trick and the lucas gas treatment and seafoam depending on what you were doing. He taught me so much
I have used MMO to clean up a dirty engine. It does an excellent cleanup job.
Since I have been running full synthetic, I see no need to do that.
I do add 16 0z. to the gas tank now and then to keep the fuel system clean.
I have added it to oil of friends and family who have sticky or tapping valves. The noise goes away almost immediately.
Synthetic oil still has sludge build up in the engines, especially in smaller crevices.
Quick 2 cents, backyard mechanic here, I had a crazy P3400 code on a used 2006 Dodge Ram 1500 I purchased. Cylinder deactivation bank1 , truck was wore out so I changed plugs all 16, filters, new coils, Changed with Mobil 1 twice with no luck, re setting the light it came back in less then 10 miles.old heads swear by this stuff so with the light on and the same oil I removed one quart and put a bottle of this in. Within 20 miles light went out and never thrown the code again. 500 miles later I’m about to drop it out, 6 quarts of Mobil 1 and one quart of MM will be my set up for now on and any car I get I’ll substitute a quart of oil for a quart of MM. I still cant believe it!
I would use Pennzoil Platinum Ultra
I been using mmo for 40 yrs at every oil change. And in fuel tank. Great stuff
I'm in the MMO believers club, been using it for about 40 years. I put a half a quart or so in the crankcase about 300 miles before an oil change and 4oz or so in the gas tank at fill up. Never a problem here and I've owned a couple dozen cars, a few I held for 10+ years.
Marvel Mystery Oil makes good tapping fluid too.
It's interesting to see the changes you're noticing in the engine. I'm glad that you have an oil pressure gauge so that you can be sure the pressure hasn't dropped too much.
This stuff is awesome. I saw a article online on how the british army but mmo in anything with an engine
i have 40 year old air tools that other than an occasional mercon II rinse have never had anything but Marvel Mystery Oil in them. recently my AT-450 grinder digested a check-ball from an exploded coupler and had to come apart and it was sanitary clean inside. pneumatic specialist beside me said he'd seen 90-day old tools with more sludge than my old snap-on workhorse had.
Lots of discussion on bobisyheoilguy on this topic. MMO has its place. I've used it a long time for all sorts of things, including cleaning up an engine. I don't use it in gas for vehicles anymore. I use Lucas for that or 2 stroke. It's mostly naptha oil with wintergreen oils for smell. It's a light solvent. Some guys will put it in the engine the last 100-500 miles of an oil change when cleaning things up. I'd also recommend HDEO diesel oil. Maybe go with a thicker grade and substitute a quart of MMO with it.
I've always been careful using MMO or Seafoam in the bottom end. They knock loose a bunch of crap and they'll clog up pick ups and filters if the motor is really sludgy.. They are also such strong solvents that I worry about starting leaks. That being said, nothing works better than MMO mixed in your gas tank. Early throttle body fuel injectors really responded to that stuff. I've also had good luck mixing just a little in with 2 cycle fuel. It brought an old Yahmaha's oil injector back from the dead.
I can hardly wait to see the final results. Great content 👍
For years Plant Mechanics had been using MMO in the Plants Air oilers for service air lubrication for pneumatic actuators, It was eventually found out the MMO was the culprit for all of the extra work in replacing every o-ring in all of the pneumatic actuators throughout the Plant... MMO attacks Buna-n Material...
I wonder if it’s the wintergreen oil in it? Place I used to work used pure wintergreen oil to soften hardened rubber rollers and drive belts.
@@stevemiller6766 It's a proprietary formula, I've tried the MSDS route.. someone once told me it had mink oil on it... Not sure about that though..
@@leskobrandon538 it's on Wikipedia
@@christianmotley262 LOL... Must be true then
I bought a 1994 Ford explorer V6 with 99150 miles on it and hadn't ran in six years. I pull the fuel tank put a pump assembly, pulled the intake manifold and installed all new injectors. The oil was brand new in it from when it was parked. My neighbor Tom was over when I first started the engine. It cranked up clattering and knocking loudly. Instantly turned it off. Tom asked what are you going to do? I said I am going to Walmart and buy a quart of Marvel Mystery oil. He said I have a quart in my building next door, I said I will give you 10$ cash if you go get it. He went and got it. I poured it in on top of the oil that was in it. I cranked it up and within 15-25 seconds that engine went totally quiet and smooth. Old Tom said you know I would never believe it if I had not heard and seen it.. I have been using it for 40 years. I have many other stories about it. You too will soon be a believer.. Good day sir, nice to comment to a actual mechanic...
Thanks Kurtis it seems to be good
The marvel mystery oil is the bomb it really really works if you use it on a really chunky dirty motor. It will plug up the filter fast so change the filter twice while the mystery oil is in there. Do it for a couple weeks and really run the motor while you have the mystery oil in for those two or three weeks and it will really clean it good. I believe it is like a diesel and somethile else mix (mystery oil)
I've got a plan lined up I'm going to follow my plan
Also I read a forum somewhere that it was a diesel type oil with some type of peppermint oil or something like that in it idk. It does smell tastey though
I've added MMO to my 69 Ford F-100 since the 70s, it works fantastic. About 8-9 years ago l decided to replace the 302 V8 with a 300 6 , l was somewhat undecided mainly because the 300 6 had over 100k mis. on it. But the 302 was tired, and the 300 6 had also been run its entire life with MMO in both the motor oil and in fuel. So.... before dropping in the 300 6, l opened up the 300 6 , valve covers and oil pan only, cause l didn't want to have to pull out again the 300 if it was bad, although it was running great. I was stunned by how clean it was on the inside! It had a yellowish gold color to the inside. I have pictures to prove my claim. Then l opened up the discarded 302 V8 and it too was fantastically clean, but it had several 100K mis. on it.
I was amazed by how clean it was too. The 300 6 runs so smooth one of my friends thought l had converted my 69 to fuel injection! So yeah MMO does a great job of keeping a motor clean and l mean everything. My oil pressure before MMO was very high, now it's lower because of MMO viscosity. On the fuel side the carb. off the old engine was also very clean. MMO is one of the best investments l have made. And no I'm not a MMO rep.
It's counter intuitive but dad had me using it for assembly lube on engines he rebuilt in his shop in the 70s.I just did as told being a kid . Never a problem.He also had customers asking about losing head gaskets until he fixed it .Back then he was painting the head gaskets with aluminized paint.Those old guys have their secrets
An old mechanic I worked with use to use wheel bearing grease on head gaskets. He never had one come back on him, but this was before EFI so today's coolant temp sensors probably wouldn't like wheel bearing grease lol.
TSB 09-003-03 is the Technical Service Bulletin for my '03 jeep Wrangler with the 4.0 engine. I had the misfire issue almost since new (I ordered this Jeep from the factory). The dealers were not much help and did a lousy job following the TSB the last time I let them touch my Jeep. I now have 100k miles. About every 5k or longer the engine will get a slight miss (manual transmission) that I can feel but will not set a Check Engine Light. At about 20k miles and 3 dealerships I started using MMO and have never looked back. I am at 101k and currently using it again. I suspect deposit buildup on the exhaust valves which keep the valves from closing at times. That TSB may help solve part of the engine misfire that you are experiencing. BTW, the gas mileage dropped 1-2 mpg and now it is back up at 18-19 highway which is good for a stock Rubicon. It takes about 2 full tanks of gasoline with MMO. BTW I tried all the injector cleaners and high detergent gasolines with no success. MMO is a cheap fix and does not seem to affect the catalytic converters.
Misfiring?
Im not experiencing any misfires
My 94 k2500 has maybe 150k on the engine/297k on the truck, developed a random loud valve train noise about a year ago. Would come and go with nothing for weeks. Replaced a suspect lifter, readjusted all rockers. Came back randomly still. Always ran synthetic 10w-30/5000 mile interval. Oil pressure would be near redline at idle hot, and at 2500rpm still alarmingly low….. sometimes. Gave her the old ATF treatment and MMO for two short oil change intervals, and it stopped. It’s had a knock only for a second after start up for a few years, so I’ve been running Rotella 15w-40 T6. That’s the flavor she likes and is still running fine. Also switched to wix filters from acdelco.
I have NEVER seen a negative comment about MMO. It is easily 50 years old and consistently a very good seller. Use it note any changes in your vehicle.
35 years ago when I first started using mmo the label use to read "will make your engine run like new indefinitely" I use it in the fuel in all my air cooled engines, also in stored fuels. I sware by the stuff.
I always added 1/2 quart of MMO to every oil change on my Chevy truck. I now have a Tacoma. I will begin doing the same thing with that truck also. Plus some in a full fuel tank.
I have had good luck freeing up sticky lifters with MMO in the past. Really good luck in fact.
Marvel Mystery Oil is a great American product ! They’ve been in business 100 years.
It's pretty interesting that an old product that's been around for years and years and years is working that well and PS I just got paid to watch this video got to love waiting on concrete
hehe, happens in all professions. Enjoy the downtime, man. It's your recovery period.
Wow, didn't expect to see results from mmo so quickly. 👍
I've been using MMO since the 80's. We lived on a farm, and the old man down the road showed me how he used it. He put it in the oil of all his equipment, in the fuel tanks and he'd use it to clean parts. He would buy it in bulk. I've used it in old cars that I would pick up to take to the scrap yard when ppl told me the car didn't run anymore. After a new battery, oil, fuel and coolant flush, I'd add this to the oil and fuel, and believe it or not they'd run smooth. But I have seen this clean so well that the sludge cleared around gaskets/seals, they'd leak even more. But that's OK, I'd gladly replace a few gasket set and sell a running engine than scrap the entire car.
MMO and sea foam 2 best things made on this planet.
I've always liked MMO plus it's usually cheaper than buying a quart of oil and since most of my vehicles take 6 quarts, it's usually most economical for me to buy a 5 qt bottle of oil plus 1 MMO
Looking promising so far. I think I'm going to pick up a bottle of this stuff and dump it in my Crown Vics crankcase. The engine's got an annoying racket that shows itself on random cold starts. Lasts for just a couple seconds then goes away. I've had people say it was the timing chain guide sticking. A friend of the family who regularly works on cars heard it and he said it was a sticking lifter or valve. It's a loud tapping noise. After it stops, there's a noticeable ticking/clicking noise that ends up going away within a minute or 2.
This was a former county sheriff's car so it has a bunch of idle hours on it. Engine runs strong otherwise.
Had an old dodge colt.had a stuck valve.sounded like a bee w/broken wing high idle low idle. Treated two tank fulls w/ marvel 423 miles later idled smooth all the time.
marvel mystery oil great stuff for engine oil and additive for your gas.
Well I’ll tell you my take on Marvel mystery oil for A different application I had some stuck bearings in a spindle shaft from a tractor had it and a 20 ton press , Sprayed everything on it could not get it to move I work with this thing for an hour trying to save the shaft because it was expensive I didn’t wanna have to buy a complete spindle assembly had it under pressure with all the pressure I could give it without breaking it in the press in my last resort was pump. The mystery oil down the shaft on the bearings went to lunch came back and the thing was loose and in pieces so I really believe in it because I tried for an hour with all kinds of stuff and could not get that shaft out of those bearings I believe in Marvel mystery oil, and I’ve had some really amazing things with PB blaster with tie rods ,front end rebuild , sprayed them & tapped with hammer ,f350 , things just came apart like butter the next day which was amazing
My Dad always had good things to say about MMO, he used it when he owned his own small garage. The only thing I noticed on a bottle of it was anything with a catalytic converter you don't want to use it as a fuel treatment.
I've been using it since 1993. Never had a problem with it on catalytic converters. Just follow the directions.
@@johnhill8958 yep, I've been using it in all 4 of my cars for 7 to 8 years. Every drop of fuel that goes in them will have MMO. Not one problem. Several 100,000 miles between them all. Someone on TH-cam did a burn off test of fuel additives and I believe MMO was the cleanest or close to it.
@@4673962 Sounds like something Project Farm would do.
That doesn't make sense. As long as you read and follow the directions, your cat will be fine
@@jmackinjersey1 I believe it was. Love his channel.
The smooth running engine is the result of reduced friction between the pistons and the cylinder wall. MMO cleaned out the carbon from your piston rings.
I had a 360 version of this truck go 270k miles without even pulling a valve cover. Eventually the intake pan went and it started using oil.
This reminded me I really should pick up a quart and add it to my 2011 Ranger 4.0 V6. About 145K miles. It has a bit of top end clatter when it's cold and I've noticed reduced power and fuel economy.
Update, I added a quart. By the time I got home that day, 100 miles in, the top end noise is mostly gone. Seems to have more power. Seems to be working!
Use it a lot back in the 1970s I always thought it was just regular transmission fluid because it looked like it, and smell like it, it acted like it! But hey it worked!
I saw some camshafts back in the 60's that came out of marvel mystery engines the parts were polished to mirror finish but were out of spec, no doubt dirt had been suspended in the oil but the filters at that time wouldn't filter damaging particles out. That's all changed with modern premium filters
Marvel Mystery Oil, "I put that S#/+ in everything".
I've never used mmo but I have been told it takes about 300 miles to properly do the job
I've had good success with the liquid molly additive looking forward to the full results
MMO is good for loosening carbon off of the rings. I suspect that you're getting more power because of that. I've always used it and had good results. My Durango has 240K on it and it runs great.
Shop I worked for sold a used motor job. Vheap swap.. No add-ons or even pulling the oil pan.. I was against it but I'm just a tech so I changed the motor. 4.0L Ranger. Start up it rattled like hell!! I changed the oil 3 times with ATF to clean it out. I'd let it idle for a hour and change it. Drain it and do it again. I finally got it to quiet down enough that I felt confident enough to let the customer take it. It never came back much to my surprise....
I have a 3.0L Ranger that would burn a quart every 1000 miles. I put MMO in it, and it burns maybe half a pint now…
Yeah old mechanic trick .works great 👍👌
I bought a 2019 4Runner and everyone said the newer V6 Motors clatter on Startup and there's nothing that could be done about it I put a half a quart of Marvel Mystery Oil in the car the next morning reduced clatter the following week no clatter at all Marvel Mystery Oil Works always has
MMO is incredible!!
You can also put it in the fuel tank. So maybe try that next?
I just dump the whole bottle in my gas tank every once in a while. It cleans out the fuel injectors, decarbonizes the piston tops, and provides additional lubrication to the fuel pump.
Excellent for diesels too for a fuel additive, normally I have to clean my DPF filters every 2yrs. It's been three on this truck and my ash count is still above 90% free.
@@applepoop10 It's a marvel !
Been doing this since the 80's.
Too much probably isn't good for catalytic converters... works well in diesel engines, though.
Whenever you thin out your oil you'll always get slightly noticable improvement. This is why a lot manufacturers switched from 5w30 to 5w20. That minor switch is the difference between 3 to 5mpg improvement.
Cafe go's up
This guys channel is great!
Thank You
Used to also use MMO in old, large, radial, aircraft engines that had been dormant for long periods to free up rings, etc, with great results (shhh.... not approved...).
Way better than Mobile 1! I remember in the 80s using Mobile 1 and blowing oil seals. Finally realized the culprit was the oil. Told one of the mechanics who taught me to wrench about it and he told me of small craft pilots who used it suffering oil leaks in flight. Sucky way to product test and I've never touched the stuff since.
E85 guys should put 1oz per 10gallons of this stuff. Keeps your injectiors lubricated.
love your videos man they are great had the 1994 engine swapped with supercharged 6.4 hemi and a 6 speed manual
sexy
My dodge had a stuck/sticking lifter and would make all kinds of noise I ran mmo and the noise went away the sludge was so bad after I had to pull the oil pan and valve covers to clean it. After mmo the engine came to life and ran great. I got 130k plus miles outta that truck and sold it and that guy is still driving it. It had over 330k when I sold it today it's over 400k original engine and trans only rebuilt once
Use it all of your small gas engines a little in you chain saw the Quilty of gas sucks right from the pump with no shelf life. I don't have carb problems anymore. I also use it to lube rifle cases when I resize them when I am reloading. Just a pinch on your fingers works.
Oh yeah. Like the first impressions video. Another comment made me think : it would be cool to take apart the filter when you change the oil to see what the filter media looks like even compared to a random regular oil change of any vehicle of similar oil viscosity
Ill do it
@@FordBossMe awesome! I'm going to run it in my 96 powerstroke about 2 weeks before I change the oil and see what it does. The truck is running good now but has sat for 3 years. Almost ready for the road again
I used this to keep the Holley from screwing up with ethanol on my 81 c10
Awesome, thanks for following up!
ATF will not do the same job as MMO. Anytime we had stuck valve problems we would cure them with MMO and of course remove all the old gas that caused the problem replacing it with fresh gas. Bardahl oil products also work well under extreme engine ues conditions.
your oil pressure is dependent on your oil pump, not likely on changing viscosity. You may have cleaned up your oil pump..
Adding any kind of petroleum based cleaning fluid to engine oil will do some cleaning. The oil appears a lot cleaner on a dip stick than it does in an oil drain pan.
I remember putting Slick 50 in my little D-50 Dodge 4-cylinder truck back in the late 80's, with the hope of more power and better MPG. Made it leak oil from every seal and gasket. It was then that I swore off engine snake oil solutions.
Mmo is basically just kerosene like diesel or no1 fuel oil (all pretty much the same thing) and a bit of naphtha oil with mint scent The naphtha and diesel is a strong cleaner and it does thin the oil but thinner oil makes an engine spin with less resistance. That's why drag racers use literal 0 weight oil. Yes mmo works but so does pura naphtha and diesel either by themselves or mixed together.
Mmo was known as snake oil not because it didn't deliver but because it's two cheap things you can mix together masked by a minty smell so people couldn't smell the two things. I don't buy mmo but I do use naphtha and diesel in oil. I do it every few years as a maintenance cleaning in my trucks. Some people use it regularly but it's a waste. Oil even if changed frequently will still make a bit of varnish but it takes years and one shot does the trick. Cleanest 300k valve covers and I do 10k oil changes with cheap syn.
It works well as a general purpose light lubricating oil, also.
I always use thicker oil cause it thins it out.If you use 5w20 use 5w30
An old timer once told me MMO was transmission fluid.
Not sure if that’s true, but it may at least be very similar.
I don't really think that's 100% true because it does have like extra fuel base to it that transmission fluid doesn't have and it's so much thinner than transmission fluid
Base component is Stoddard solvent. Get the MSDS sheet and look at it. Although they are not required to identify "proprietary trade secret" compounds.
Nice I think I'll try that stuff out.
Should have done a compression test before and after, MMO could be removing/dissolving crud in the piston ring grooves/lands... I've used Rislone flush running and Berryman chemtool for static flush (Oil Pan Off) with great success
I could have done a lot of things, let's just go with it and see what happens and not nitpick
@@FordBossMe I see no nits to pick..Lol.. When I did the flush as stated above, I noticed a 20psi (dry) increase in cyl psi with an evening out across all 6 cyl..jeep 4.0.. the motor had been a victim of short drives below operating temp, it was sludged up like chocolate pudding with tons of varnish.. eventually I had to replace the lifters, which lead to replacing the cam, which lead to replacing the cam chain and oil pump which lead to might as well do a valve job... It had 185k at the time, now it has 623k on the OEM rings and bearing...
The oil does look dirtier than it did yesterday, hoping for great results and I'll put it in my 2001 5.9
I thought it looked more like diesel oil than yesterday too. Very curious to see the inside again.
This stuff worked for me once. Than my car caught on and demanded more fancy crap. Now i use liquimoly oil, and lifter additive and ceretec. Oil temps dont hit 190 in 110 degree weather beating the crap outta the throttle, and the valvetrain soundtrack has been muted. Only downside is playing scientist with a measuring cup. 7 times 🤣
If you really want the engine cleaner, try adding an additional bypass filter that cleans the oil of contaminates down to 1 micron. Best of luck !
ive always sworn by mmo i know alot of people that do too
I noticed the same power bump with my 05 Mitsubishi Lancer. (2.0 N/A) Did an oil change with 20% MMO and it became more responsive. The car burns oil like nuts (nothing can fix 190k mile piston rings) but it runs like a clock as long as I don’t let it run low
Some years ago I read a technical analysis breakdown of the components in MMO. Mostly petroleum distillates (solvents) with a light lubricant added. Don't remember all the chemical breakdown but no real mystery. Way back when (way, way back) there was a product on the market that would do the approximate thing that MMO would do, it was called Rislone. Another old timers trick: Back in the late 50s & early 60s a lot of cars would develop sticking hyd. lifters creating a noticeable clicking noise. The mechanic would put in a quart of ATF & have the owner drive it for about a 1000 miles then change the oil. Worked about 80% of the time. If it works then use it.
I've heard of old timers using ATF in the engines, one I knew would pour a little in the carb and make a lot of white smoke.
@@christianmotley262 Yeah there were products that had instructions to do something like that. There was one that had a complete system that metered some sort of product into the intake manifold. It was supposed to provide upper cylinder & valve lubricant. The stuff was put into a glass container under the hood & attached to a bunch of plumbing that was attached to the intake system somehow. I have only seen one actually installed but had seen ads in car magazines back then.
@@christianmotley262 Yeah, there were a lot of shade tree fixes back then. To break free the carbon deposits on valves they would pour water out of a Coke bottle into the carb on a running & hot engine. The ATF thing was real & it did make a bunch of smoke. There were other products that suggested that you poor their concoction into a running engine. I have no idea if any of the fixes worked.
You would be very excited if you put MOTORKOTE in your crankcase..highly recommend it..
Been using motorkote products for years ,nothing bad to say about it. Bless ya'll from hooterville,n.c.
@@hosslane320 I started using Motorkote products for about two years now..& I can honestly say my engines Ford 6.8 Triton
GM 2.2 Ecotech & GM 2.2 Vortec have increased MPG & smoother quiet idle.
Hi Rich. Would you agree, that if the engine was properly maintained with regular oil changes. That this mmo would not be necessary. Thanks the old school guy.
Yes I do agree with that statement but at the same time it could actually help any future varnish or build up just as a preventative with the oil like maybe 3 or 4 ounces only