The main reason I am bring this up is because I have read lots of good things about mobile one. I recently purchased a 190 16v and am trying to sort things out. The records for this car shows a variety of viscosities were used. Currently the car uses a 20 / 50 weight. Mileage on the car is 160k. I was considering switching to mobil one. One mechanic told me he wouldn't recommend it because the engine would not be used to it. What ever that means... So I thought I would ask everyones opinion.

what say you?