Looking for the most experienced oil filter expert (or moderator) to answer one question.

This is why I'm not as anti-BOSS as many other people are. Yes the micron rating is quite unimpressive. But they do flow well. Maybe that's a winning combination in spite of the micron rating?
A few PSI difference in dP between oil filters isn't going to matter on an engine fed by a PD pump, and with an oiling system that is typically 15 times more flow restrictive than the oil filter. In Ascents ISO testing, the OG Ultra actually had less flow dP than the Boss, and smoked the Boss in efficiency. Of course that was the OG Ultra ... too bad First Brands shot themselves in the foot on making changes on the Ultra.
 
@Bob69, what do you expect to accomplish by seeking out the "best" oil filter on the market? Are you looking for the longest engine life possible? If so, exactly how long do you plan on running this, or these, engines? A million miles? Two million? Five million?

Whenever discussions come up here on BITOG, about the "best" protection for engines, suggesting that there must be some ultimate product, or products, that will protect engines from wear so much better than the competition, that they would clearly be the only choice anyone who really cares about their car, would use, I wonder where the evidence is to support these claims. And somehow my mind always wanders to all those that have been recognized for driving a car into the million mile club.

I've spent a fair amount of time reading accounts of cars that have made it to a million miles and beyond. Interestingly, there is quite a spread of how these cars were operated and maintained. Everything from the BMW that Mobil ran solely on a test stand, with all oil changes done precisely to the BMW service manual, and all using Mobil products, to the guy who did all his own maintenance on his
Accord. And the lady who drove her Tacoma to deliver seafood to restaurants, and all maintenance was done at the local Toyota dealership, with oil changes at the Toyota recommended interval. And many more.

In all these million mile cars, there is no evidence that any one oil filter was the best at long engine life. The only real constant that I found, for all million mile club cars, was being constant at regular maintenance, including oil changes.

So again, what are you looking for from a "best" filter?
 
I haven't been on the forum for years so excuse me for asking this one question (I did search, a lot):

Which oil filter is considered the "best" on the market (2025 USA)?

I've been using the Purolator BOSS PBL30001 (PH8A 3/4-19 equivalent size) and don't have any complaints. I did read about the large micron particles that got past this filter but also read that that may have been an error?? I've been using this BOSS filter (PBL30001) since it first came out and have done serial EOA's with good results (very low wear metals).

The problem I'm having is that this particular PBL30001 filter may have been discontinued ie: all I can find are filters that are a couple years old at a few Advance Auto stores. They weren't even on the main display shelf, the clerk had to go to the back storeroom shelves to find one or two that looked like they'd been around for years and all had the older design HEX shaped box. I called Purolator customer service and the lady on the phone didn't have much information. She said the PBL30001 was a good/active part number but didn't realize the PBL30001 filter was essentially absent from store shelves.

Filter type and usage: spin-on filter, synthetic oil, normally aspirated Gasoline/Petrol engine, normal driving, once per year (10,000-12,000 mile) oil/filter changes.

What I'm looking for (my definition of best):
Highest micron rating (lowest micron size particles removed at the highest percent) but still flow adequately
Filter media that can hold up for at least a year/15,000 miles without falling apart using full synthetic oil
A very good anti-drainback valve (my filter is mounted horizontally so it tends to drain out more easily than filters in other positions)
A filter that won't bypass more than absolutely necessary
Preferably Made in USA (Made in Japan or Germany, maybe).

I've read dozens of threads trying to get the answer myself but honestly they all seem to get so deep into the weeds with varying opinions my eyes start to bleed. So as not to start another long confusing thread with conflicting or personal opinions, is there someone (?moderator or known expert) that can list the top engine oil filter(s) (in the PH8A size) available today??

If an expert lists a particular filter, please include the supporting data (or links).

Thanks
If you asked that question 5 years ago, Fram Ultra would be the consensus pick.
But today's Fram Ultra has been cheapened so much with defects introduced that allow unfiltered oil to escape filtration due to a gap with the leaf spring, and also internal filter tearing.

So you should monitor this oil filter forum of all the latest C&P's where the latest version of several filters have been cut open and flashlight tests performed for leaking leaf springs gaps and internal filter material tears.

I'm no expert on Purolator filters, but didn't they have a publicized defect of filter material tears?
 
Thank goodness for fresh date codes. Perhaps that will make up for the dismal efficiency.
Me:
“Boss is widely available and still made. I got one from Amazon and it had a fresh date code.
Boss is a filter I would use if it had an old date, like 5 years. Full synthetic media.”

It isn’t that hard to follow.
 
Excellent pricey choice.
synthetic Stratapore media (y)
I just ordered one off Amazon today for $16.97. Going to be used as a remote transmission filter for the F150.

While I wouldn’t call $17 a cheap filter, it’s not nearly as expensive as its Donaldson sibling & is more in line with Amsoil or RP equivalent filters.

Flow rate of about 15gpm with 100% efficiency at 24.5 micron is no slouch either. Nitrile ADBV though the smaller LF16002 also has this & seals better than the Fram Endurance or Amsoil filters I have on the bench.
 
Lots of filters meet that criteria. What's important to you in an oil filter besides that?

Some people here don't even care if their filters leak dirty oil or tear media, lol.

Not that many years ago engines did even have filters. Many engines still don't nowadays.
 
Wix

Source filters from authorized dealers.

Quality is superb, and application coverage is tremendous. There's a reason autozone, advanced, Walmart, etc etc don't sell wix. Its because they only sell garbage
Whatever next? Thanks for the warning, chortle.
 
They are still fine.

I deal with many fleet shops, they mostly run Wix, Baldwin and CAT. Talking thousands of trucks and pieces of equipment.
I’ve cut dozens of Wix light duty vehicle filters. They are now M+H abominations. 2016 was the purchase by M+H and the start of manufacturing consolidation. Like I said I used and recommended Wix exclusively for over 20 years. The tractor world I can’t comment on.
 
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Not that many years ago engines did even have filters. Many engines still don't nowadays.
Not too many years ago was like 80 years ago, lol. Full flow filter use started around 1943 (Pure-Oil-Later). Does that mean people shouldn't run any oil filter now? Might as well go back to the pre-1940s if oil filtration doesn't matter. 🙃
 
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