I did a search on "Best Synthetic Oil" and nothing really came up. So...to all those much more "in the know" about full synthetic oils, which one would probably be king of the hill. From reading in the forum, it seems like Mobil1, Redline, Amsoil, Royal Purple, Neo (not mentioned too much), Schaeffers? (not mentioned too much), and ???? are the ones in question. Driving style, vehicle, daily mileage, driving conditions, cost, etc. aside. List the top three and why you chose each for that rank. I know there will be all sorts of opinions. I just wanted to view what others thought on the subject. Maybe this question can't be answered due to driving style, vehicle, daily mileage, driving conditions, etc. Give it a whirl!