The domestic link has all of the introductory information, and is also more
complete. There is some really good information about filters on these
pages!!
Domestic:
http://minimopar.simplenet.com/oilfilterstudy.html
German:
http://minimopar.simplenet.com/oilfilterstudy-german.html
"You'll pay to know what you really think."
-- J.R. "Bob" Dobbs