Quote Originally Posted by dvldoc View Post
There are lots of independent test as well. Just like this Test Pictures and Results - Oil Filtration Comparisons From the Workbench

But all a individual needs to do to see how well there filter is working is do a oil test with a particle count.
Yey!

A iso test cost about 1600USD a filter so it's not something most individuals who don't have access to the equipment to do the particle counts can do.
Boo!

Thanks doc