After reading the links to Bob is the oil guy.com it doesn't make much sense for me to be using Mobil 1 EP changing the oil as often as I will be. The extra additives in EP would really only benefit me if I was to do longer drains. Mobil 1 Supersyn 5w30 changed every 5000 or 6000 KM or 3 to 4 months is already over kill.