Quote:
Originally Posted by cbdo
... 5-30 found its way in there once by error and consumption went way up. MB obviously had certain characteristics in mind in designing the engine, and set their recommendations to match them. Re oil type, the best performance I've had re leaking at 165K is dino old-engine formula, Valvoline in my case, so I'm stickin' with it. For this high-mileage beast with no top end work done yet, and not much needed, frequent changes seem more key than high-tech chemistry. But that's my answer for a high-mileage seasonal-use car--your situation may be different, and it's always "horses for courses".
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I agree with you. I recently bought a 1991 300CE with 120k miles on it. After I bought it I had all the fluids changed, including the oil. I decided to try Mobil 1 5-30. Big mistake. Oil comsuption went up way high.
Went back to dyno 2-50 and oil consumption dropped down to a little less than a quart every 3k miles. Which is pretty darned good for a high compression engine with 126k miles.
Stick with the info in your owner's manual; look at the detergent qualities of the oil you use and change it often. Dino oil is cheap, and engine overhaul is expensive!
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Current Benzes
1989 300TE "Alice"
1990 300CE "Sam Spade"
1991 300CE "Beowulf" RIP (06.1991 - 10.10.2007)
1998 E320 "Orson"
2002 C320 Wagon "Molly Fox"
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