Oil Filter Study
 

Found this article on Oil Filters that some may find interesting.

http://people.msoe.edu/~yoderw/oilfi...lterstudy.html

Don't forget air filters...
 

This post is on 4x4Wire and pertains to T100's and the 3VZFE. But the results probably apply across the spectrum of Toyotas and other vehicles...

Filter Testing