OK. Since no one else is willing, Ill provide a link
NTPOG Oil Filter Review to one attempt to review oil filters. I'll provide some relevant quotes.
"This review contains no SAE or ASTM test data regarding filtration ability or flow information. This data changes often (as do the filter designs) and in some cases is not even available (publicly) from a manufacturer. "
"Even the worst of oil filters will last for 3000 miles without any problems at all, and almost any motor oil will last for 7500 miles."
"but the fact is that just about every brand name non-synthetic oil (or "dino") will last 3000 miles and have almost no significant wear to the oil or engine"
"The FRAM x2 (and only the FRAM x2 Series) is probably the most heavily constructed filter I've seen so far."
"No claim as to the reliability or performance of any filter reviewed here is made."
"The information presented here is intended solely to help you determine which filter is right for you from the stanpoint (sic) of construction. "
Anyone know what the the equivalent conversion to miles to hours would be? My guess, on average, about 100 hours, but for sure between 50 and 150 hours. My Kubota calls for oil changes every 100 hours and oil filter changes every 200 hours. I'm lucky to get 60 hours in a year. So with an oil and filter change once a year I'm safely within the recommended use of any filter or any oil. BTW, like most people, I change my filter every time I change my oil. So I'm never anywhere near exceeding Kubota's recommendation for changing the oil filter.
I did not even know this report existed until I did a google search a few minutes ago. I think it supports my contention that any filter you buy is adequate and no tests are available showing an inadequate filter brand. If you can find any scientific report that says any particular filter is not adequate please provide a link. I'd loved to be convinced.
BTW, It would be nice if the next person to call me ignorant would at least provide some data supporting their contention.