Research
I like to do my own research. I don't mind sharing it.
Disclaimer
I attempt to conduct research without bias, as best I can.
No research was done as a promotion, no one was paid. All of the research and resources I pay for out of pocket. The shop doesn't even pay for it.
If you don't like the observational findings from the data I collect there is really nothing I can do about that. Data doesn't have an opinion. Data is there for you to form your opinion from the information. How much of your personal bias you use when doing that is also up to you.
Forum posts and rage bait do not qualify as data. Information from 5 years ago may no longer be accurate. These are all factors to consider when conducting research.
Engine Oil Filters
Brand Research
This is a WIP and there are a lot of sources that cannot be confirmed.
Excel Doc (4/2/26 latest update)
Word Doc reviewing ties between Doc's and TPC
Filter test data
These are from a variety of sources, some the MFG, some owners, some third party testers.
Cat Oil Filter Information (from their website 4/2/26)
Docs Oil Filter Information (from their website 4/2/26)
Article including test on K&P cleanable Oil filter By Dan Horton, 5/2/2025
A forum post that actually used oil tests to compare oil filter performance between Fram Ultra and K&P Nov 2023
Video (s)
Some of these are in house, some are sources I found credible.
Often referenced Ford Tech Talk video from Oct 2019
Links to a pretty well thought out test done by Total Seal Piston Rings Part 1 and Part 2 July 2023
How to read oil sample tests from Horizion / Oil Analyze