"The average internal combustion engine" ... pretty open ended qualifier. But if you go search and read some engine wear vs wear particle size and oil cleanliness tests, the conclusion is that cleaner oil will always result in less wear.
Purolator Efficiency on Upgraded Oil Filters
- Thread starter Baracoa
- Start date
Definitely important to see what filter number is being referenced when given a certain efficiency rate. They may not all be the same efficiency as you clearly state. I wish that each Purolator filter number would disclose their efficiency and psi of relief valve either on the Purolator web site or on Advance Auto Parts where they are locally sold. I am not sure why filter companies don't disclose such information just as they do the size of each filter.
What is typical oem filter efficiency? Is the Boss not on par with many oem filters but a longer lasting filter? If I am looking at micron charts correctly, 99% of particles of basically what a human eye can barely see are caught and 50% of human white blood cell sized particles caught. Fine sand is 90 microns. Rock catcher comments a bit over the top no?
Re: bold parts. Because it would be very expensive for any filter company to test and every filter model for efficiency that they make. Since Purolator is giving you specific efficiency numbers on filter models that are not the 30001, I'm wondering if they actually tested them, or maybe they are mathematically estimating the efficiency based on half way decent models they have for the media they use - that would be possible to do with computer modeling.
Purolator doesn't state what the bypass PSI setting is on some of their filters? Never saw that before.
It's an endearing BITOG term used in efficiency relativeness speak. Most engine wear occurs from particles 20u or less.
Is it because filters are catching a lot of anything larger so it is assumable that 20 and less will cause the wear because those typically are the only ones mostly getting through? 300k plus engines using jobber and less efficient oem filters are definitely out there. I get price point vs efficiency logic but are we making mountains out of mole hills for most folks on efficiency ratings in comparison to engine longevity and how long even most bitogers keep an engine?
On AAP the PurolatorOne 14612 indicates PSI under the Specifications Tab as follows: "Relief Valve Opening Pressure: 14-22 PSI". However, that information is not present for the same filter in the Boss. Is that information on Purolator's web site?
MrQuackers
Site Donor 2025
Well, it is more efficient than the VW Beetle filter.
Yes, look up filters on Purolator's website. I always look at the specs from the manufacturer, not 3rd party like AAP.
https://www.purolatornow.com/en/part-finder.html
Example, not the filter model you referenced.
It's been discussed many times. Wear from particles 20u or less is because of the particle size with respect to the film thickness between parts. It's been said many times, that the longer the OCI the more important a high efficiency oil filter becomes. On a broken in engine, if you changed the oil every 1000 miles or less you probably wouldn't need an oil filter and the engine would last a long time. All I can say is that cleaner oil is better than dirtier oil, regardless of how you take care of the sump to ensure it's not highly contaminated and ran for a long time, because level of contamination times the number of times it flows through the oiling system correlates to the rate of engine wear. I'd rather use more efficient oil filters than not (it's also a "back-up" to the air filter), but that's just how I take care of my stuff.
Plus the fact its so much more than the new Purolator blue can explains why one has never made its way onto the Corolla!
Thanks
That's mostly a secret as OEMs info is generally "proprietary". In 2011, Amsoil gave a little peek inside that "proprietary" info with ISO test results. Two notable results, Toyota OEM and Honda OEM in the 50-65% range @20um. Considering the reputation of engines from those manufacturers, something to think about. Especially when discussing some aftermarket filter efficiencies.
Personally, would have much rather had testing of some of those OEMs than the testing of the aftermarkets that was done and posted this subforum.
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4WD
$50 site donor 2025
It’s really hard to have a discussion about oil filter effects on wear at this sight - you might know why …
These numbers align with what I was told about the 10241 line up as well.
Is there any real life evidence that using an oil filter that is rated for, say 99% at 40 to 50 microns, for the entire life of a car the engine will not be able to make it from 200,000 to 300,000 miles?
No.
On paper, the more efficient the filter, the cleaner the oil, the less wear.
In practice it doesn't seem to matter much. Just like thick v thin.
Here we go.
I am of the same opinion. Otherwise OEM filters would be built to be more efficient than most are.
So you’d promote using the Boss filter?
