[JFP in PA]

Originally Posted by Frodo

Why do you suppose it is that some of the most highly touted motor oils (Royal Purple, Red Line, etc.) don't seem to make the list? (I'm guessin' somehow it's money-related, but I don't really know.)

Paul, what do you use? What do you think of the Castrol synthetic?

Rather than “speculate on the monetary veracity” of the Porsche list, why not do some research on what specifications (e.g.: ACEA ratings) the oils that they do “approve” have or don’t have? Could just be eye opening as well as informative………..