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Old 03-25-2002, 06:36 PM
savagetom savagetom is offline
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Join Date: Oct 2001
Location: Vienna, WV
Posts: 121
I think 20W-50 is a little heavy. I will probably cause no harm but your gas mileage will suffer a little. I personally think 5W-40 is best but that is hard to find in a synthetic. Mobil makes Delvac-1 in 5W-40 but markets it only as a diesel engine oil. It will work fine in our gas engines but you can only find it at truck stops or Mobil distributors. Allegedly Mobil is making a special 0W-40 that is available only at Mercedes dealers for big dollars.

I take the following approach. I the winter I use 5W-30 Mobil 1. It the summer I use 5 quarts of 5W-30 and 2.5 quarts of 20W-50 - all Mobil1 synthetic. YMMV. It'll end up around 10W-40.
Tom Savage
Vienna, WV
1984 300D Euro
1995 S320
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