“I have been using Mobil in my BMW and now Merc and it is an Oil that meets my expectations. My car has already done 103k miles and it is still clean on the inside when looked into oil filling cap and engine is relatively quiet (you don’t hear rocker arms). I belive it is partly due to my sub 10k regular oil changes and partly due to Mobil quality. Using mobil is just my preference and whether it is due to good advertising campaign or the fact that performance cars are using it…. I don’t know. It just works.”