Back in 1997, who knows who was building Quaker State oil filters. Lots of off brand filters use the same basic model numbering as Fram even though Fram had no involvement in making the filter.
This is why I only trust the efficiency info that is on the manufacture's website. Who knows where these 3rd party sellers get their information. Like I mentioned earlier, if the manufacturer is willing to give that kind of info to the 3rd party sellers, why don't they also just put the same info on their own website. Wix doesn't do that ... you can't find any reference on Wix's website saying to what efficiency test spec they use to rate their filter efficiency.
Some oil filters become less efficient faster with use and dP loading than others. It all depends on the media design and the size of the filter, and how the dP increases as it loads up. Most oil filters are typically more efficient when new, than slowly lose efficiency as they load up. Some are worse than others - again, depends on media design and area. A filter with a lower ISO 4548-12 efficiency is most likely sloughing off more already captured debris than a higher efficiency filter. It's hard to distinguish the difference between actual capturing efficiency and retention of already captured efficiency. But the bottom line is a filter with a much higher ISO 4548-12 efficiency is doing a better job at both.
Where can you find the specific filter data on the Purolator site? I’m trying to find info on Pure One Filter PL24011 and I’m not seeing it. Thanks for your help.
Purolator only references their huge 30001 filter model for ISO 4548-12 efficiency. It's a footnote at the very bottom of their pages. There have been some threads were people contacted Purolator and got some specific filter p/n efficiency. But not all PureOne filters are 99% at 20 microns.
I sometimes feel there should be some simple regulation on oil filter industry so we can get more consistent and accurate performance claims. For me, Fram is the only company that tries to provide a reasonable number by testing three filters within a family.
the next fill for this car is straight M1 Supercar 5w-50
Checkout the AC Delco Gold version UPF52R specs, much better than regular Delco. Base plate, canister heavier, improved filtration. Amanzon $9.57, Rock Auto $7.78
If it was like what Fram does, that would give a good ISO 4548-12 comparison. Test 3 filter sizes in each line (small, medium and large), and report the average efficiency of those three for particles 20μ and greater (basically at 20μ).
LOLLot's of people think their engine oiling system works like their house plumbing system or fridge filtered water spout, and a more restrictive filter means "less flow".
