How To Significantly Improve Fuel Economy: '97-'04 F150, F250 LD, Expedition, Navigator Part 1
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- เผยแพร่เมื่อ 3 ก.ค. 2024
- Links Below: Parts I discuss in this video show how to significantly improve the fuel economy of a 2002 F150 with the 5.4 2V engine from an EPA highway rating of 16 to a real world rating of 22 mpg. These modifications will work on the 4.6 2V engine or any vehicle with a similar set-up. Some of these modification can be used to modify a 4.2 V6. CORRECTION: I mentioned '94 Mustang Cobra Water Pump & should have said '04 Mustang Cobra Water Pump.
Oil Catch Can - pg/DrivingIn...
See my fuel economy playlist: • How To Improve Fuel Ec...
Parts used:
MagnaFlow Cat-Back Performance Exhaust System 15749: amzn.to/3JgefMz
Flowmaster Super 40 Mandrel-Bent Cat-Back Exhaust System DK108-BK: amzn.to/3zhe6Un
Royal Purple Gear Oil (front & rear axles): amzn.to/3QJcNF9
Royal Purple Transmission, Transfer Case & Power Steering Fluid: amzn.to/3pywBiL
Motorcraft PW423 New Water Pump ('04 Mustang Cobra) - amzn.to/3BQHUs1
Pacesetter Shorty Headers 70-1327 - amzn.to/3cMrpB2
Volant for 10th Gen F150: amzn.to/40jmqPn
K&N FIPK 57-2541 for 2002 5.4 F150 - amzn.to/2sJkCVz
Spectre Kit - SPE-9920 - amzn.to/2YQ2Pbr
Oil Catch Can - DrivingIntel...
SCT X4 Programmer (F150) - amzn.to/2RN4Fuh
Superchips Flashpaq 1842 Programmer - amzn.to/3sCHFhh
BBK 1703 75mm Throttle Body - amzn.to/3a2C3Bk
BBK 15550 Underdrive Performance Pulley Kit - amzn.to/3a9BXrA
Flexalite Model 270 Electric Fan - amzn.to/378hceW
A few of my tools:
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Universal 7-12mm Brake Bleeder Wrench Kit: amzn.to/4882DGl
eBay Store: www.ebay.com/str/drivingintel...
Driving Intelligence:
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Can be used as reference for:
10th Generation F150; f150 de décima generación; 1997 F150; 1998 F150; 1999 F150; 2000 F150; 2001 F150; 2002 F150; 2003 F150; 2004 F150 Heritage; 2nd Gen Lightning; 1st Gen Harley Davidson F150; F150 Standard Cab; F150 Supercab; F150 Supercrew; 2002 Lincoln Blackwood; 1998 Navigator; 1999 Navigator; 2000 Navigator; 2001 Navigator; 2002 Navigator; 1997 Expedition; 1998 Expedition; 1999 Expedition; 2000 Expedition; 2001 Expedition; 2002 Expedition; 1997 F250; 1998 F250; 1999 F250; 1997 Ford Lobo; 1998 Ford Lobo; 1999 Ford Lobo; 2000 Ford Lobo; 2001 Ford Lobo; 2002 Ford Lobo; 2003 Ford Lobo; 2004 Ford Lobo; 2005 Ford Lobo; 2006 Ford Lobo; 2007 Ford Lobo; 2008 Ford Lobo; 2009 Ford Lobo; 2010 Ford Lobo; 2000 Harley Davidson F150; 2001 Harley Davidson F150; 2002 Harley Davidson F150; 2003 Harley Davidson F150; 1999 Ford Lightning; 2000 Ford Lightning; 2001 Ford Lightning; 2002 Ford Lightning; 2003 Ford Lightning; 2004 Ford Lightning; Boss F150; 10th gen king ranch; 10th Gen F150 King Ranch; King Ranch Supercab; King Ranch Supercrew; FX4; 1997 F250; 1998 F250; 1999 F250; 2000 7700; 2001 7700; 2002 7700; 2003 7700; F150 FX4; F150 Lariat
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It is your responsibility to confirm the compatibility of parts I recommend on this TH-cam channel. Also, although I feel confident with the repairs and upgrades I perform on this channel, your performance of the same is at your own risk to your vehicle and person. Please practice effective safety procedures.
Better Fuel Economy; Fuel Economy Improvement; 10th generation F150 fuel economy; 10th generation F150 fuel economy improvement; 5.4 2v fuel economy; 4.6 2v fuel economy; 4.2 v6 fuel economy; Power Tuning; Custom Tuning; F150 fuel economy improvement; F150 bad fuel economy; How to improve fuel economy; Navigator Fuel Economy Improvement; Expedition Fuel Economy Improvement; Ford 7700 Fuel Economy Improvement; How to improve 10th Gen F150 Fuel Economy; How to improve 10th Gen F150 MPG; How to improve Ford Expedition Fuel Economy; How to improve Ford Expedition MPG; How to improve Lincoln Navigator Fuel Economy; How to improve Lincoln Navigator MPG; ford f150 fuel efficiency; ford f150 fuel economy
00:00 Introduction To Improving Fuel Economy In Older Trucks
01:20 Using SCT X4 Or Superchips Tuner To Correct Odometer and Improve Fuel Economy
01:55 Adding High Flow Intake System To Improve Fuel Economy
02:44 Adding A BBK Oversized Throttle Body To Improve Fuel Economy And Throttle Respsonse
03:04 Adding Underdrive Pulleys & Electric Fan Conversion To Improve Fuel Economy And Performance
03:52 Adding Oil Catch Can To Improve Fuel Economy & Performance - ยานยนต์และพาหนะ
Good job on vids brother.. very clear concise & educational. I have bbk under drive pulley parts lined up & am considering doing a 75mm throttle body. I use all synthetic fluids.. mobile 1.
I say considering a lot on some parts because I am very meticulous and take my time on choosing mods for my project as I can tell you have obviously done your research as well instead of just throwing on aftermarket performance parts and expecting the hyped up gains advertised ;)
I have no true desire to do Dyno tests but in modest consideration I'm guessing I've gained 15-25hp with flowmaster cat back, rear cat delete, weapon x coil on plugs, gotts mod, synthetic fluids, k&n drop in. I'm expecting to gain 20-25hp above that with custom tune, shorties headers, under drive pulleys, 75 mm. throttle body.
My performance plans are more focused on the under drives, custom tune, oil catch can & a near future 4.10 rear gear change from oem 3.55's.
So to finally get to my question haha.. in changing your stock throttle body, did u as well over stock size your maf to maybe a 80 mm. ? & Have u increased your fuel injectors to like 24lbs to compensate for hp gains over 304hp if you've achieved that?
I'm trying to make sure all of my mods coexist & enhance well together.
Good questions. So far, since I am stock internal, I've not run out of fuel. I keep an eye on the fuel trims when I am driving and they stay very close to 0. This much better than prior to my custom tune. I need to do more research on your topic, but I guess there is alot of room with the current fuel delivery when only doing bolt-on mods (no blowers / turbos). The throttle response, drivability and general enjoyment driving this vehicle is amazing now. Love it... I have 3.55's... been considering doing a gear change as well, but it runs so damn good now... I keep asking why?
Mobil 1 is bullshit
@@Lestergreen77 why ?
How about motorcraft syn ?
@@brianmcgee8493 I tested their annual protection oil and it failed bad
@@DrivingIntelligence
Yep I've got 3.55 now but I sure like my torque!
I've read a while back, there is a basic formula used when reaching fuel delivery cap upon hp's in stock but I don't recall now. I do remember it being like 304 or 315 hp's though before need to go with larger maf & throttle body. I'm likely hitting about 300 hp. now.
Honestly the two best things I have done is a Cat-Back system 2.50 inch and rear cat delete. I'm running a sido with a flow super 10. Would really love to do a stage 1 or possibly stage 2 cam but not wanting to go into the engine unless have to.
Really appreciate your videos dude. This is great information that is hard to come by, especially in such a clear concise manner . Great stuff.
thank you very much! These comments keep me going!
You’ve got a great page and I enjoy watching your immersive and honest research and work on display everything you do and say is great content
Thank you very very much! I appreciate you taking the time to leave this comment. Stay tuned and let me know if there’s anything of particular interest to you.
Great results
I think so too!
Very cool
Thank you
so helfpful given the current out of control gas prices...
Fully agree, I’m thinking about doing another video on fuel economy, improvement
@@DrivingIntelligence do it!
Good video Barry. I am going to get the pulley kit and look into your water pump when I do the electric fan. I wonder if this 94 Mustang water pump will fit a 4.6?
Check my description for the pump. I made a mistake in the video. It’s an ‘04 Cobra, not ‘94. My description has all the parts.
@@DrivingIntelligence thank you
@@titanicfilmsbymark very welcome!
I'm nervous about putting an electric fan (in place of the clutch driven fan) because you mentioned you had some reliabilities issues with it. If you had to guess just for the fun of it how much MPG improvement do you get from just that one change?
I would say definitely 1-2 mpg. That was my primary goal, but the performance improvement was more noticable, especially on the highway. I don't blame you for being nervous. The wiring harness if the biggest issue. I don't have experience with other harnesses, so I cannot recommend. Look at reviews and forums. And in another video, I go over the installation: th-cam.com/video/GJFxI3SbXC8/w-d-xo.html
The intake on these truck are a true cool air system from the factory the inlet is inside of the driver side fender pulling air from the wheel well. Putting an aftermarket system like this usually decreases performance because the air inside of the engine bay is much hotter and thinner than the air from the wheel well
Very good points, check my other videos on cold air intakes. I’ve done some testing and designed my own ram air system. Let me know if you need me to send you the link
This has always been a head scratcher for me as well. I wondered why I would need a CAI when, as you say, it kinda already has one. I did drop in a K&N ( for what it is worth) not sure it really helps. I’m only getting about 8 mpg.
I agree, the only thing I’d change of my air box is the the tube that goes from the filter to the throttle body. Very restrictive, I’d just get bigger diameter tubing but keep stock box
@@DrivingIntelligence I had a 2005 Expedition which the previous owner had installed a K and N CAI. That truck's MPG ranged between 14 and 18 miles per gallon. I currently own a different 2005 Expedition that only gets between 10 and 12 MPG. My driving habits are the same. On the one I currently own I performed a complete timing job. The previous owner had ran the engine until the guides broke. In addition I replaced the plugs and coils, installed a new HP oil pump and water pump. Any idea as to why I'm getting such terrible gas mileage? Thanks.
Also I wouldn't classify either the K and N set up or the Volant set up in the same category with the 'OEM' cold air intake. What actually makes the difference is the placement of the air filter media. Its not an 'upgrade' or a 'modification' from stock, non CAI system, to a CAI system. It has to due more with air flow, volume and pressure modification.
@@etripp111 I get the same mileage with my 05 expedition, it’s a pig
Can you do a video of where to run the hoses for the catch can?
Already have one in my 10th Gen Playlist and also in the Oil Catch Can Playlist: th-cam.com/video/3mGy2IYouo4/w-d-xo.html
Any issues with the underdrive pulley kit? Like charging, or steering, air conditioning etc?
With regard to AC, charging and steering, no issues at all. You may need to get a new tensioner if yours is worn out or a slightly shorter belt to prevent belt slip at start-up. Otherwise, a good modification.
From what I've heard, the key to gas mileage out of the 2V engines is letting them breathe. You've got the top end covered, have you tried pairing a set of BBK short headers with this build to see if it squeezes out any more mileage?
good question, check out my fuel economy playlist. I've done a lot more to make this beast more efficient including Pacesetter Shorty Headers. Now I have to contend with exhaust leaks at the headers! ;)
Thank you for these videos! I've been considering selling my 02 F150 Supercab Lariat FX4 with 171k miles on it and buying a new truck but now I want to swap out the fan and maybe some more changes to improve it! Years ago, I installed the Superchips 1715 87 tune and it added very noticeable power. Do you know anything about installing a larger tube on the intake where it goes through the fender? Some think the intake is too restrictive there.
Glad these vids are helping. There is room for improvement with just about any vehicle and especially these 10th Gen F150's, from comfort, to convenience, to power and fuel economy. It's been a fun journey with more videos to come. A buddy of mine has a 2018 F150 with the 5.0 Coyote Engine and had to have his cam phasers replaced with less than 60,000 miles! All manufacturers have problems with product quality and they charge too much! I want a Raptor R, but $150K?!! No way! As far as intake performance, check out my Playlist on Inlet Air Systems: th-cam.com/play/PLGNsbVXzRfZO1uUo3V7XnVrMsSEv4od_K.html
Got an 03 fx4 XLT fx4 5.4 and the only issue l have is rotted rocker's. The truck only has 130 thou on it so even with getting the rocker's done it's better than a payment in my book.
@@Anthony-kn8cn completely agree... that's one of the main themes of my channel, older vehicles can provide the same pleasure and dependability as newer vehicles, and in fact, new vehicle quality seems to be dropping over the past several years.
What’s the part or where did you get the Electrical Fan kit with the thermostat? I’m trying to source the same and or similar for my 4.6L 2V in my F150. TY👍🏼
Very sorry for late reply! I don't recommend my electric fan kit. I won't mention the name of the company, but I had problems with the relays failing too many times. My fan is a robust stock Ford fan, I need to look up what vehicle it comes from. On the 10th Gen forums on Facebook, there are some people who make very dependable wiring harnesses for this purpose. I'll check to see if I can find out some info for you...
@@DrivingIntelligence Recently bought a 1999 f150 5.4 with 86k. Im interested in switching to an electric fan curious what you came up with also. @Jaybolt i hear some people on a budget just buy dual electric fans from a used ford windstar and a cheap controller. Those windstars were 3.8L i have a feeling that might work on a 4.2L maybe even a 4.6L, i doubt in the summer they could keep up with a 5.4 thouhg. Im getting mixed answers some say it works fine others say it does not in the summer. Im still researching it though.
Mr. Scott, I bought my kit from a company that specializes in Lightning F150's. They use a stock Ford fan rated at enough CFM to handle a supercharged 5.4, so no worries about our trucks. But, their harness is less than dependable. The fan installs in the stock shroud. There are many aftermarket kits that include the harness and also activates with the AC. Do an internet search. I don't have any specific recommendations as I have not tested any other kits. Sorry I cannot be more help.
What size tires do you have? I have my grandads old 2002 5.4 now he was up in Virginia and I’m in Georgia so a change in altitude but with slightly oversized tires he averaged 16 I think it was meanwhile I average 13 being easy on it. I have heard there’s some maintenance things you can do to help. I will look into I’m not super worried about fuel economy but the truck running best it can as it has 335k miles on it. All fluids will be changed I’m sure it needs it
Thanks for the question. I was running 265-75/16 tired when I made this video. That combination was much lighter than what I’m running now. I’m going to change my 3.55 rear gears to 4.10 in the future.
This makes me wonder what kind of milage I could get with the 4.6. with similar mods. l know its under powered compared to the 5.4 which doesn't help in the mountains where I live. Also been thinking about removing the CAT since I love the truck and don't plan on selling it. Thanks for sharing! 🤙
You'll definitely get improved performance & fuel economy with your 4.6. I wouldn't remove the cats. Unless you're running boost and other serious performance upgrades, won't make much of a difference and will make your exhaust much louder. I plan on buying a new cat and installing myself... one of mine is bad. Better for the environment.
@@DrivingIntelligence Ok good to know 👍
My apologies, don't mean to change subject matter.
I'm curious about your thoughts on professionally having fuel injectors cleaned (off rail) ?
I'm iffy on it because I use the same fuel & use techron fuel system cleaner approx every few months & have read that likely the professional fuel injector cleaning process is no better than using techron cleaner.
With regard to cleaning, I say, if it runs good, don't mess with it. My only problem that may lead me to cleaning and rebuilding mine is the possibility of the injectors leaking slightly. I notice some difficulty restarting after having driven for a while. I smell fuel when it finally starts which tells me there may be fuel in the intake or cylinders because the injectors are not holding. I have a major project planned to fix leaking valve cover gaskets, replacing the timing sets and when I do all this, will clean and rebuild my injectors. Hope all that makes sense, and thanks for all your positive comments! Hope you have subscribed!
@@DrivingIntelligence
I have indeed subscribed as well as watched all the videos. Good content.
@@DrivingIntelligence
I haven't had any fuel smell problems or drivability issues. It's the " it ain't broke don't fix it" thing. but I love keeping things clean and hoping to improve it's performance.
@@DrivingIntelligence
I'm doing research on which shorty headers to utilize. I've looked at the pacesetters you got.
Still indecisive on (unequal) length or (equal) length as I've not done anough research. Any suggestions?
Low & mid-range is my interest along with sound.
Nice truck nice work!!! But cold air is not working nothing works as good as the factory ones more for looks.....
Thanks for the comments! You're right, the filters are not cold air, but you need to check out my intake playlist to see my tests on this subject and building a ram air kit for this truck: th-cam.com/play/PLGNsbVXzRfZO1uUo3V7XnVrMsSEv4od_K.html&si=1_IGi-YoTMea8FtH
Hey, I have an oil catch can but I can't figure out how to run the hoses, did you put it from the pcv, into the catch can and then out to behind the intake manifold?
Yes, exactly. I have a playlist on oil catch cans that may help.
@@DrivingIntelligence alright, thanks
@@danielcastro8012 please subscribe!
Where did you puechase your electric fan kit?
Hello, I did not put a link to the electric fan kit because the kit I used had many problems with the wiring harness. I do not want any of my followers having the same problem. The fan kit I used has a very good FORD Electric Fan, but you cannot buy without the wiring harness. There are some good sources for the wiring harness on Facebook. Check some of the 10th Generation F150 Forums. I have not tested any other wiring harnesses. Let me know if you have any other questions.
Do any of these mods affect your ability to pass emissions tests? (Specifically the tune and the pcv catch can).
In California they'll take any reason they can find to give you a hard time.
good question, and one of the reasons I left California. The tune, oil catch can, under drive pulleys and any exhaust modifications before the cats might limit your ability to get an emissions test approved. I have another follower currently living in California that I'll ask to also comment on this.
Hello Alex, I live in Socal and you need to be careful of some mods. I did the oil catch can but I am going to disconnect it. Very simple disconnect. CA doesn't want you to mess with programming of the ecu unless you can get a 50 state legal unit that can program your ECU. I have bbk shortly headers that are legal here. They don't want you messing with the pully system which is dumb. They say that there's a smog pump and there is not on our trucks. Hope that helps.
@@titanicfilmsbymark great answer Mark, thanks for your help.
@@DrivingIntelligence anytime
You said you replaced your water pump with a 94 cobra water pump. Can you post a part number for this? Also what year is your truck? I have 2001 f250 with the 5.4 and was going to get the edelbrock version for the mustang for my truck but don’t know if it’ll fut
Thank you very much for this question. After all this time, you pointed out something that was a mistake in my video. I posted this correction in the comments: "CORRECTION: I mentioned '94 Mustang Cobra Water Pump in this video. I should have said '04 Mustang Cobra Water Pump. Link Below" The link to the water pump is now added to this video in the description - Motorcraft PW423 New Water Pump ('04 Mustang Cobra) - amzn.to/3BQHUs1
Forgot to answer your other question, my truck is an '02. The pumps should work for all years, but make sure. I think the snout lengths are different depending on application. Also, you cannot use a clutch driven fan with the Cobra Pump.
@Driving Intelligence, I really appreciate you getting back with me. So I am getting electric fans just waiting since they are on back order. I also have Bbk under drive pulleys and was going to do the water pump pulleys and electric fans all at the same time.
I have a 99 5.4 and I'm getting 8 stock. Hopefully some mods will help it
Do you have oversized wheels? Or is it completely stock. That is extremely off for a stock 10th Generation.
@@DrivingIntelligence I have the stock 17 inch lariat wheels that came on it. I also have a check engine light so I need to get a obd scanner and see what it is.
@@dentside take it to Autozone or Advance or another parts store where they do free scans. But don't let them talk you into parts before you investigate the code yourself. In fact, drop me the code when you get it and I will see if I know anything about it.
@@DrivingIntelligence next time I'm in the town with auto autozone ill be sure to drop in and have them scan it and ill let you know
@@dentside look on the inside of your door you should find the stock wheel size there. My 99 f150 5.4 came with 16in wheels.
The best I got with no mods was 22mpg but that was 200 mile one way trip at 65mph. Gas quality makes a big difference too imo. I normally get 12-14 driving back and forth to work. 16.5-17mpg is the best I got on 100miles round trip.
Did you originally have a heated pcv valve system? Or did you delete that and just run it to the back of intake manifold?
I did not have a heated system and in fact, never heard of it! Tell me more!
@@DrivingIntelligence basically Ford designed (for these trucks) a system that uses engine coolant coming from the pipe that runs under your intake manifold to back of water pump, and T'd a smaller hose to go to a fitting that sits around the pcv valve, then runs to one side of the throttle body elbow port where your egr,fpr, and evap vacuum elbow is. But on those style elbows, the pcv valve vacuum hose T'd off and one vacuum hose ran normally to the back of the intake manifold and the other hose ran to that elbow port. This style elbow port also had the coolant fittings made into it. Where that one coolant line (from the pcv valve) connected to one side of the elbow port and then the other port on throttle body elbow, connected back into the coolant system. They had them mainly on the v6 but I don't remember what year the 5.4 and 4.6l got them. It's purpose was to keep sludge from building up in the actual pcv valve and in the throttle body elbow (it's called a plenum but gets confusing explaining that way) so that the ports didn't get blocked off and to minimize the risk of the pcv valve failing to exhaust the crank case gases. Some people don't like them and switch back to your style. I kind of support the purpose even though it doesn't seem to make a whole lot of difference.
Sorry for late repay Dyllan, thanks for all that info!
Curious of the return on the investment. How many miles does it take before break even. I would guess over 30k.
I think I did an ROI in this video: WOW Results! Electric Fan Conversion MPG TEST! '03-'09 Dodge Ram 5.7 Hemi Flex-A-Lite 183 Install
th-cam.com/video/1vdRbI2hKxU/w-d-xo.html
Need bottom cushion for drivers side for 1998 f 150
Hi, did you see this video? Driver Side Bottom Seat Cushion Available 10th Gen (‘97-‘04) F150 / 7700 / F250 LD!
th-cam.com/video/7BRBVS-ES58/w-d-xo.html
I extended my wires on my temp sensor and ran it over to the inside of the fender and that fixed that problem
thanks for that comment... I think I'm in a little brain fog... what problem are you referring to?
Are you intentionally running a 6 Rib belt on an 8 Rib pulley?
Good question, the pulleys are all 6 rib other than the alternator pulley which is aftermarket.
have you thought about lowering the truck. I would like to lower my truck 2-3 inches for fuel mileage and also my wife getting in and out of the truck.
Interesting question, I was actually considering that a few years ago for a different look. I’m not sure how much mileage improvement you’d get. I’m working on a video series about re-gearing the truck to get better mileage and performance. As far as lowing, adjustment the front torsion rods and drop shackles in the rear can maybe lower about 1-2”.
@@DrivingIntelligence Your truck has a block above the axle to raise it if it is like my 02 and lowering the rear looks like it's a matter of removing those blocks and shorter u-bolts. I'm not interested in lowering mine because I drive it on the beach in deep sand sometimes.
I have a 98 4.6 I wonder what mileage I could get with all these mods
I’m sure you’ll get an improvement. 4.6 gets better fuel economy than my 5.4.
I have 2000 f150 manual. V6. Not great gas mileage
Even the V6 performance can be improved
I have a 03 xl with the 4.2 and am probably getting 11mpg.
That poor engine is working hard to move that big truck. Try some of my modifications.
Can't hear it
sorry, later videos are better... had just started my channel when I made this video.
talk to low , even with my netbook up high
Thanks for the comment. I’ve been working on improving the sound. Hopefully my latest videos are better.
Moral of the story dont buy a truck if you want to get 14 mpg....just buy a ford focus if you want 22 mpg 😂
Great comment from somebody who probably didn’t watch the whole video
You mean DO buy a truck if you want to get 14 mpg?
Nothing wrong with trying to get your vehicles as efficient as possible.
@jackielyon87 why should a truck be inefficient, and why does Ford create a vehicle that can get better fuel economy with my aftermarket changes instead of building in these changes from the factory? I’m not into new vehicles. Definitely not worth the money, nor having to deal with modern poor quality hassles. This truck is rock solid with lots of potential.
The most important thing is gearing the rear differential to get better fuel economy because my diff is geared 3.26 or 3.06 or somthing my 01 f150 4.2 supercab gets 25mpg metric on the highway..... and I still have the stock radiator fan and the whole engine hasent been touched
Thanks for the comment... and thoughts. Check out all my videos, I also talk about gearing. But I have to point out, there is a big difference between a 4.2 v6 and a 5.4 v8. Yours is supposed to get better fuel economy, mine was only supposed to get 16 mpg highway, so I think I did pretty good ;)
@@DrivingIntelligence yeah I've deffinitley seen the 4.2 get pretty good gas mileage but in town it suffers ull be lucky to get 16mpg. You did good with the 5.4 engin tho in town roughly it will get 12 mpg and on the highway they usually get 18 to 20 mpg as far as I've seen
@@GeraltOfRivia99 currently I average about 15 city mpg and about 20 with the bigger wheels and tires, performance equipment and 4.10 gears.
@@DrivingIntelligence nice yeah the differential ratio is hit or miss depending on your driving. If you drive on the high way alot you will get better gas mileage with a lower number ratio. But with the 4.11 you will get up to speed faster and tow better and in town you will actually get better gas mileage with a 4.11 rather han a 3.26 etc. So meh lol it's a toss up but I would lean toward somthing like a 4.11 or closer to it
@@GeraltOfRivia99 Here's a video I made on fuel economy with 4.10's. I have several videos I made regarding the swap to 4.10 gears. th-cam.com/video/QCkgikKV5eM/w-d-xo.html