Wait, it only matters with a bypass filter? Why not with a spin-on or a cartridge? Don’t they both reduce contamination in the oil pan?
“So far I haven't seen any real winners except the Frantz bypass filter.” It’s in your quote of my post.
Ascent test was on one filter. His first testing try also I believe. I guarantee you Purolator, Mann, has far more expertise and funding to do their tests, just like Fram does. It’s interesting to see people put Ascents test over Fram or anyone else. Makes no sense to me. I would never believe published Fram or Purolator test data takes second place to Ascents test. He even made precaution statements, but that is not taken into account.
In fairness we never see actual run data from any of these companies.
I have ... and it's certainly not a no-name oil filter off of RockAuto, lol.
So you're claiming Andrew didn't know what he was doing? His lab is ISO certified. If you actually paid attention to the data in his testing, you'd see that Fram's claims and his data pretty much coincide. If he would have measured down to 5u the Ultra looks like it would have made the 80% @ 5u claim from Motorking. As discussed many times, if the ISO test is ran in 10 different labs by 10 different people there is probably going to be some slight differences, but you will not see a huge disparity between the test results. And so you think the one filter he tested was some unicorn that happened to be better than any filter Fram ever tested themselves?
Oil in the pan doesn't lubricate anything. Oil pumped through the filter provides the lubrication. You could fill the pan with a bunch of marbles and it wouldn't make any difference.
The best a current wix/napa gold is at 10um is 50-60%. A fram ultra is 74% @10um, the old fram ultra was supposedly around 94% @10um.
Zeeosix,thanks! I was bored n looking through threads,and found the old micron efficiency.but,you went all out man!
Well, Motorking (who worked for Fram) said the Ultra (the full synthetic version anyway) was 80% @ 5u. In this thread (link below), the full synthetic Ultra was 99.9% @ 20u and 99.8% @ 15u ... close to the PureOne data in post #10 at 15u and 20u. The Ultra might be better at 5u ... but IMO you're basically into hair splitting territory at that point. Using either the Ultra or PureOne is going to give you about the most efficiency you can get in a passenger car spin-on oil filter.
As mentioned before, the filter size (total media area) can have an effect on the ISO efficiency. That's why most filter makers reference their largest filter(s) as the test reference model.
