^^^^^The author of that camparo/test used bitog river rat/rob's test design, the summary Rob's results can be found
HERE. If you want to see the entire thread of his work you can google 'some Some Filtration Comparisons from the Bench'. While it's somewhat dated now and newer synthetic filters not included, his results unlike some others (GMC filter comparo) pretty much correlated to then known ISO test efficiency ratings for the filters.
And to the topic, in the case of the oem Toyota filter and similar no endcap type filters, his results were later confirmed by the Amsoil ISO 2011 test. Before that there was no oem filter information on Toyota and similar filters so Rob would/could have had no idea when he tested them that that the results for them should have shown significantly lower efficiency. I found that pretty amazing and lent itself all the more to the validity of his test and the reliability of his results. Not too shabby at all for a basement filtration test comparo.
Back to author of Mitsu Evo and his opinion on "aggressive OCI." I find it a little ambiguous. I think most on bitog far more knowledgeable than me would completely agree with his last two sentences. dnewton has oft posted about changing the oil too soon/too often. The first sentence about 'aggressive oci' is too vague for me and could be left out. I'd say run an oil and filter to match the intended oci/fci and get the max roi. In other words, don't run Mobil 1/PP and an Ultra for 5-6k/6 month oci/fci. Just wasteful imo and not coming close to the oil and filter intended use and/or limit. My .02 on that.
Originally Posted By: HosteenJorje
... At what mileage/age will the benefit of using a more efficient oil filter begin to show up(compared to using a less efficient oil filter)? Is it 50,000 miles? 100,000 miles? I doubt the average owner, following all the OEM recommended maintenance schedules, would see any noticeable difference in ten/fifteen years of ownership @12,000 miles a year.
Point noted.
Otoh and 'strictly' playing devil's advocate here, what's the difference between someone desiring to use a more efficient ISO rated oil filter, and someone admiring/desiring Toy oem 'evenly spaced pleating'. Rhetorical. Just someone's preference. And it should be noted, I use and have used all kinds/brands of filters, mostly with value for construction type, coo, and some efficiency that I desire. And while I'm currently running an FU on a Tacoma, to ~15k two ocis, a Napa Gold/Wix will be replacing it. So ultimate efficiency not a must for me. But, that's my preference.