I use mostly mid grade fuel with occasional top ups with premium. No problem. Would suggest if you are going to push you engine accelleration have premium in the tank.
FYI, I don't know why but I noticed I get better MPG's with regular than with premium. 04 CLK320
The reason is the ECU is set-up for at least 91 octane. If you use lower octane the ECU will pull timing (to prevent knocking)...this will effect gas mileage.
WTF would you use cheap gas over the good stuff? To save $3.50? Is that really worth risking anything? Here is the difference based on the current national average as of today. (usa) I am assuming a 13gal fill up.
How could someone be so cheap, especially driving a MB sports car? 1 simple repair would cost over 50 times what you would save by buying cheap fuel. Penny wise, Pound foolish.
Well said! This guy above knows his shyt unlike you other fn idiots.... For the record, Shawn your straight moron* You know have one the Best Car on the Road right? How could you use the worst gas?!! Im in Florida, so ONE time I was forced to put Regular horse piss fuel due hurricane*which made my car run like shyt! I just dont understand you fn people! Right next to the gas cap on the flap piece IT SAYS "PREMIUM ONLY" What the fuk is wrong you? cant read? Trade your Benz in and go get a Kia.... then you can you use all the Regular fuel you what* Ha!
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