Man.......what does it take to get my message across here ?
1. I use Mobil 1 0 W 40 oil ( as per M-B spec ),
2. I use ONLY OEM filters,
3. I change both @ 6 200 miles,
4. Oil analysis says I could double this, but I DON'T.
In 40 years of driving & maintaining countless vehicles, ( my " other ride " currently has 400 000 MILES on it ) I have NEVER had an engine go sour on me.
Comprende ? Liberal Arts student ?