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

 

Too bad it's starting to be dated. It confirms word-of-mouth I'd heard: stay away from Fram and re-branded Fram's (Pennzoil, et al). Looks like the Motorcraft gets high honors. Nice to know that the filter the dealer will be putting in will do the job well.

I've saved that link along with other oil-related web pages. Thanks for posting it.