Oh jeez... HUGE CAN OF WORMS! this topic has been burned through numerous times on just about every forum. Just do a search and read pages on top of pages on the subject.
Fwiw I use rotella synthetic.
just the ones im curious about as well but the way i see it its better to sub than start a whole new thread, but i do try to add to the conversation anytime i have helpful advice but since i am far from an expert i try to not be the first to give advice if im not 100% sure. The way i see it nobody can ever learn too much and apparently youre interested in all the same topics i am or you wouldnt see all my subsdamn do you sub to every thread on this forum! :spit: