Synthetic oil in an old old 190E ????
My 1988 190E (2.6L 5 Sp) has over 240,000 miles on it. It is time to change the oil. I bought the car a few months ago and as far as I know, there has always been "real" motor oil put into it (previous owner swears by Valvoline Turbo). My question is: dare I put in something like Mobil 1? Or will that synthetic oil seep past seals or be of little advantage on a motor with this many miles on it? Your comments, please. Thank you.