I found an oil filter study online and oddly enough it was somewhat hard to find. The original intended link wasn't "available" and through some lucky clicking I came across this interesting study.

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

I haven't completed reading this study yet and as a result haven't formed an opinion. I just thought this was a good find for those who's interested in this type of info.

Comments are always more then welcome.