Quote:
Originally Posted by RANDY P
1)- being a 1991 the car wasn't designed with synthetic in mind. Oil has changed and not for the better:
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Theres a few Mercedes engineers out there that would beg to differed. I switched my m103 to synthetic rotella 5w40 at 150k miles when I bought it. No problems 3 years 37k miles later. I change it once a year regardless of the mileage. If synthetic oil is going to kill my engine it better do it soon before I get bored with it.