8 Top GM Oil Filters Cut Open - 2 Clear Winners! Fram, Bosch, Wix, Purolator, AC Delco
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- เผยแพร่เมื่อ 4 ก.ค. 2023
- 8 popular GM filters compared. All of these filters are very good and imho 2 are outstanding.
This is the filter spec is used on my stroked LT1 383 powered 1992 Corvette (which is why I was interested in doing this comparison), and, this is a super popular filter, used in millions of GM cars. Models listed below.
Update: even though I purchased all filter new, the Fram Titanium was slightly old stock, and it's construction is actually exactly like the Fram Ultra filter.
Full Disclosure: my 1992 Corvette has a pretty rare Lingenfelter built engine and it is amazing. I feel very lucky to be the owner of this car. It sees numerous track and autocross days each year, and it's 30+ years old, so choosing the very best available filter and oil for optimal performance and protection is super important to me. I was using a Mobil 1 filter (a good option) and, thanks to doing this comparison, moving forward I will be using a Bosch Premium 3430 filter paired with Mobil 1 Supercar 5w50 oil.
Every filter tested would be a good choice. The Bosch Premium's 99% at 20 micron rating, lots of pleats / filter area, large ovalized inlet holes and solid bottom plate with no bypass valve were the qualities that in combination led to me selecting it for my Lingenfelter Corvette. Oil will be changed at least annually not more than 3,000 mile OCIs.
All 8 Filters are ultimately made by 2 parent companies: First Brands (Fram, Champion Labs - AC Delco) and Mann-Hummel (Purolator, Wix, Bosch, Mobil 1).
All Applications of this Filter Spec:
AM General Hummer (1995-96)
Buick Century (1982-89)
Buick Commercial Chassis (1994-96)
Buick Electra (1985)
Buick Regal (1982-93)
Buick Roadmaster (1994-96)
Buick Skyhawk (1982-89)
Buick Skylark (1980-83)
Cadillac Cimarron (1982-86)
Cadillac Commercial Chassis (1985-96)
Cadillac DeVille (1985)
Cadillac Escalade (1999-00)
Cadillac Fleetwood (1985-96)
Checker Marathon (1980-82)
Chevrolet Astro (1985-99)
Chevrolet Beretta (1987-91)
Chevrolet Blazer (1992-05)
Chevrolet C10 Pickup (1985-86)
Chevrolet C1500 Pickup (1988-98)
Chevrolet C20 Pickup (1985-86)
Chevrolet C2500 Pickup (1988-95)
Chevrolet Camaro (1981-92)
Chevrolet Caprice (1981-96)
Chevrolet Cavalier (1982-91)
Chevrolet Celebrity (1982-90)
Chevrolet Citation (1980-83)
Chevrolet Commercial Chassis (1994)
Chevrolet Corsica (1987-91)
Chevrolet Corvette (1992-96)
Chevrolet El Camino (1981-87)
Chevrolet Express 1500 Van (1996-99)
Chevrolet Express 2500 Van (1996-99)
Chevrolet G10 Van (1985-95)
Chevrolet G20 Van (1985-95)
Chevrolet G30 Van (1985-96)
Chevrolet Impala (1981-85)
Chevrolet Impala SS (1994-96)
Chevrolet K10 Pickup (1985-86)
Chevrolet K1500 Pickup (1988-99)
Chevrolet K1500 Suburban (1992-99)
Chevrolet K20 Pickup (1985)
Chevrolet K2500 Pickup (1988-00)
Chevrolet K2500 Suburban (1992-99)
Chevrolet K3500 Pickup (1988-00)
Chevrolet Lumina (1990-97)
Chevrolet Lumina APV (1990-94)
Chevrolet Malibu (1981-83)
Chevrolet Monte Carlo (1982-97)
Chevrolet P30 Van (1990-98)
Chevrolet R10 Pickup (1987)
Chevrolet R20 Pickup (1987)
Chevrolet S-10 Blazer (1983-94)
Chevrolet S-10 Pickup (1982-04)
Chevrolet Silverado 1500 Pickup (1999)
Chevrolet Tahoe (1995-00)
Chevrolet V10 Pickup (1987)
GMC C1500 Pickup (1985-98)
GMC C2500 Pickup (1985-94)
GMC Caballero (1981-87)
GMC Envoy (1998-01)
GMC G1500 Van (1985-95)
GMC G2500 Van (1985-95)
GMC G3500 Van (1985-96)
GMC Jimmy (1995-05)
GMC K1500 Pickup (1985-99)
GMC K1500 Suburban (1992-99)
GMC K2500 Pickup (1985-00)
GMC K2500 Suburban (1992-99)
GMC K3500 Pickup (1988-00)
GMC P3500 Van (1990-99)
GMC P4500 Van (1985-90)
GMC R1500 Pickup (1987)
GMC R2500 Pickup (1987)
GMC S-15 Jimmy (1983-94)
GMC S-15 Pickup (1982-90)
GMC Safari (1985-99)
GMC Savana 1500 Van (1996-99)
GMC Savana 2500 Van (1996-99)
GMC Savana 3500 Van (1997)
GMC Sierra 1500 Pickup (1995-99)
GMC Sierra 2500 Pickup (1995-97)
GMC Sierra 3500 Pickup (1995-97)
GMC Sonoma Pickup (1991-04)
GMC Syclone (1991-92)
GMC Typhoon (1992-93)
GMC V1500 Pickup (1987)
GMC Yukon (1992-00)
GMC Yukon Denali (1999-00)
Isuzu Hombre (1997-00)
Oldsmobile 98 (1985)
Oldsmobile Bravada (1991-01)
Oldsmobile Cutlass Calais (1982-84)
Oldsmobile Cutlass Ciera (1982-89)
Oldsmobile Cutlass Cruiser (1987-88)
Oldsmobile Cutlass Supreme (1982-96)
Oldsmobile Firenza (1982-88)
Oldsmobile Omega (1980-83)
Oldsmobile Silhouette (1990-95)
Pontiac 6000 (1982-91)
Pontiac Bonneville (1986)
Pontiac Fiero (1984-88)
Pontiac Firebird (1988-92)
Pontiac Grand LeMans (1981)
Pontiac Grand Prix (1981-96)
Pontiac J2000 (1982-83)
Pontiac J2000 Sunbird (1984-85)
Pontiac LeMans (1981)
Pontiac Parisienne (1983-86)
Pontiac Phoenix (1980-83)
Pontiac Sunbird (1985-86)
Pontiac Tempest (1987-91)
Pontiac Trans Sport (1990-94) - กีฬา
A visual inspection doesn’t tell the whole story but thank you.
The Wix bypass is the best design on that table. You don’t understand the design, doesn’t make it “ clunky” lol…
100%!
thank you for cutting these things up for us.
That “clunky functioning” Wix bypass valve is designed to bypass the oil BEFORE it back washes the dirt from the exterior filter media in the bypass mode.
This!
Thanks for the concise video!
I've noticed that some oil filters have the circle holes and some have the rectangular holes my concern with the rectangular holes is that it can cause lower oil flows having this design I love the videos keep up the great work
Check out the "Brand Ranks" youtube channel. They did flow testing and particulate testing, and the purolator did the best filtering and was close to equal on flow with the others. I think one reason it did well at filtering is because the bypass valve completely seals off, so no unfilttered oil sneeks by. It's good to see the Fram titanium also adressed sealing off the bypass valve area .
you can request exact filtration efficiency / data sheet for every single individual Purolator filter. which is fantastic - no other company provides this level of detail and transparency. for this engine application the efficiency results for the Purolator filters are as stated in the video. the ISO tests Purolator uses are far superior to the Brand Ranks test.
I'll never buy Fram. I had a Fram double guard completely block oil flow after 500 miles. Oil was completely clean. Oil pressure dropped to near zero.
Sorry your focusing on the wrong things and simply cutting them apart tells you squat without knowing flow rates and backpressure. The very worst thing a oil filter can do is starve the engine from high backpressure that damages both the engine and oil pump. Wix has one of the best reputations out there and looking at the back plate and beefy spring would be my 1st pick hands down.
This was my thought too, he completely glossed over the build quality of the Wix filter without even understanding, or explaining why Wix made it that way.
Agreed
@@handyman1957 Sadly WIX sent production over to china, so I'm not so sure about their future.
I have used mostly Mobil 1 and Wix XP for so many years without a p roblem...K&N also!
Never witnessed an engine suffering lubrication related damage using mid-level oil filters changed at regular intervals.
The high-end Frams are decent, but I question the rather small holes in the inner core.
We don't have the micron rating here in Europe for cartirdge filters ( not screw on type),would be cool to have.
I have used NAPA gold, which used to be made by Wix, for years with no problems that could be traced back to a filter issue. I have had two different cars over the years that the oil light would come on at idle in gear that I repaired by merely replacing the orange Fram oil filter with a NAPA gold.
yeah - these are each brands top filters. I will say that the budget AC Delco is really solid construction.
The Purolator Boss filter is much better than what you are claiming. Brand Ranks built a serious test rig and its still at the top of leaderboard. Does it hold up to the 99%+ rating? no because thats unrealistic for us normal people and done outside of a lab.
none of the claims are mine - they are exactly what Purolator states on their data sheets. it's all public information - search for yourself or email them directly. Brand Ranks created some interesting test equipment - but it is NOT the same quality or standards required by certified ISO lab testing
With the talk about Bypass..Each vehicle engine has a specific Bypass PSI Requirement.
Do all or any of these meet this Bypass Requirement Accurately?
There are two factors that determine a good filter, Filtration and Flowability. If the filter is too restictive then the oil will just go through the by-pass. Keeping an eye on the condition of the oil tells you if the filter is doing it´s job.
Not just that, but the more restrictive filter media will clog faster.
@@handyman1957 I imagine the auto motive industry and filter companies have worked together a long time on filtration and flowability and have come to the conclusion that 25 - 30 micron is the best as most filters are of this micron rating.
Yup, and I got to thinking, if the filter is too restrictive, the better chance of it opening the bypass and then your not getting any filtering at all. @@markwarnberg9504
@@markwarnberg9504 what you're describing applies to old-school surface filtration and the Bosch and Mobil 1 are perfect examples. Mobil 1 (made by mann-hummel) is rated to 20k miles and only removes 30 micron particulates. the Bosch (also made by mann-hummel) is rated for standard oil change intervals (max 10k) and filters down to 20 microns. with traditional filter technology you can have extended drain intervals OR fine filtration - not both.
In contrast, depth filtration media (like what's found on the Fram Titanium, Ultra and Endurance) is proven to flow well, have a great contaminant holding capacity and they remove down to 20 microns and smaller.
@handyman1957 filters clogging are even needing you go into bypass mode is super rare. even 50 years ago it was uncommon - unless there was an engine issue or the oil and filter were left in service waaaay too long. this comparison is between the top offerings from each brand - so 100% safe for their rated oil change intervals.
I have never seen a drain back oil filter test. So, whose filters drain back valve really works the best?
where the hell did you get the filtration numbers on that purolator? That’s a 25 micron at 99% efficiency.
That would be 99+
false. what they print on the Purolator boxes isn't accurate. you have to email them to get the actual efficiency for each individual filter. here's the details: bobistheoilguy.com/forums/threads/purolator-99-efficiencies-confirmed-boss-46um-one-30um-pbl24011-pl24011.371384/
Purolator Boss for flow and Amsoil for filtration
How many companies do you think are pressing out these pieces
In what world is a bypass not supposed to be present?
Los motores que utilizan filtros sin válvula de derivación, ya la tienen integrada en el motor.
all GM applications that these filters are built for already have an oil bypass valve on the engine. that's why most filters for these engines - including the ones made by GM / AC Delco do not have bypass valves on the filter.
The "seal" doesn't matter. Like you said-- it's a "spring". Which means that it opens and lets oil bypass at the slightest pulse in pressure. They all do this. The filter can't be allowed to clog like a fuel filter, because it would kill your engine. So they ALL easily allow the oil to bypass by design. Especially the "better" filters that have the ability to catch the finer particles. Bypass is happening regularly.
the filters in this comparison with the finest filtration Bosch and Fram Titanium (and the OEM AC Delco) all do not have bypass valves - because the GM engines that they're designed for already have oil pressure bypass valves. so having another bypass on the filter just isn't needed. i would argue that bypass is happening very very rarely - and that all filters tested are designed to flow well and functionally filter even in the most demanding race applications. oil bypass isn't a normal operational occurrence - it's a failsafe for when routine maintenance isn't performed or unexpected contamination levels occur.
Interesting comparison, in my observations you see far more Fram filtered engines in the junkyards that I frequent than other filters. Just an observation. So I personally do not use Fram for anything
check out this video - which extensively looks into the Fram issue
That would be their bottom of the barrel orange can of death.
where was that bosch filter made from??? jsut curious
north carolina
i wish you cut open the standard ac delco
the standard AC Delco is a great filter for the $$! this video was intended to compare each companies premium offering - but in another video show how good the standard AC Delco is:
th-cam.com/video/sldaP2-gJ0A/w-d-xo.htmlsi=B7UBwtVsqNtPfm3S
Put a flashlight in the hole and you'll see light through the bypass plate...
At one time on here many guys were proclaiming Fram were totally crap filters. Are they being made better now than they were? Wix Gold were known to be an excellent choice, so i don't know. I had a 1991 VW Turbodiesel that had 698,714KM on it, when some asshole running a red light totaled it. The engine was still running great and i expected it to go much longer. I used Bosch oil filters until i couldn't buy locally and then switched to Wix Gold. Drove the car daily 220-230 KM Mon.-Fri. and winter temp. MINUS 30F and lower. Conventional oil with VW recommended 8000KM intervals. It would be barely 1/2 Liter off the full mark by then. I don't see the number of pleats meaning much unless you cut them completely open and stretched the media open to compare surface area. Not much of a comparison shown here.
There seems to be zero consideration for the length of the filter medium.
Filter ! "I don't even know her"
Where is the top tier Amsoil filter? 🇺🇸🇺🇸🇺🇸
Just get purolator and you'll never have any problems.
weird that you say its a 46micron filter, puralator claims 20microns at 99% for the puralator boss, not sure where the published that its 46 microns
bobistheoilguy.com/forums/threads/purolater-boss-46-micron-and-purolater-one-30-micron.369023/
@alecchildress4514 this was my specific inquiry:
bobistheoilguy.com/forums/threads/purolator-99-efficiencies-confirmed-boss-46um-one-30um-pbl24011-pl24011.371384/
weird, that makes me want to stop using this filter, on their website they claim 99% at 20 microns with this filter@@BRS_Racing
All these WIX fanboys. 😅 I been buying the cheapest filters I can find for yearsssss. Super tech is my go to. No problems whatsoever. If you want to pay $14 for a filter great. Nobody is mad at you 😅
You forgot the K&N FILTER!
this is a comparison of the top filters for this application. the K&N isn't on par with these
I’ll take a bigger micron number and change my synthetic oil at three thousand miles
why? when for the same price you can have cleaner oil
@@BRS_Racing
I’ve seen reports were it can impede oil flow
There should be no bypass? I stop watching after this comment.
Algunos motores utilizan filtros de aceite sin válvula de derivación, porque ya tienen esta válvula integrada en el motor.
all GM applications that these filters are built for already have an oil bypass valve on the engine. that's why most filters for these engines - including the ones made by GM / AC Delco do not have bypass valves on the filter.
Pffft frams a joke.
Hmm what about six xp?
XP is their extended drain filter - but it's filtration efficiency is low 35+ microns.