Ran one of these filters on a tractor engine for 35 years and would swear by it. (Mind you, I did replace the engine a few times, as well as most other parts on that tractor.) I couldn't see a problem with them, and the toilet roll would not break down and clog the oil galleries.

Did a touch of research, the TP oil filter is not to replace your high flow filter but is used to supplement the filter system. It uses a by-pass system as explained in the attached article:

"The diverted flow is quite small, and poses no risk to overall lube flow and pressure. A stock oil filter is typically adequate in filtering down in the 10-20 micron range - but a bypass filter like the Frantz pictured above will take out stuff down in the SUB-micron range!

Why is that significant? Because wear particles larger than 2-3 microns are capable of bridging the usual layer thickness of oil film in rings and bearings, and causing accelerated engine wear - and obviously, the stock filters are pretty useless down at those particle sizes."

This make some sense to me and I now understand why the TP doesn't blow or fall apart. JLP

Edited May 17, 201113 yr by JLPurcell

that must clean the sh*t out of your oil!