So you did mean 0w-20? What does it offer that 0w-40 does not? MB recomends 40W oil in most of their cars and a lot of the other Euro cars do. I know on older engines 0w-40 has been known to cause low oil pressure. I can see the difference on my guage when using 5w-40 vs 15w-50. But I have a 603 a very different animal than the modern gas engines.
Do you get your oil tested? I would be interested if you get more wear metals with the 0w-20 vs 0w-40.
No I don't have a S600 my good friend does. But W140's are temting. Their is a nice 1997 S420 and a real nice 95 S320 in the paper both for $16K!
