I have been wondering recently what the best speed is to drive my car. I drive a 1994 c280. with gas prices the way they are, there has to be a formula to determine (no matter what octane you run) what speed you will get the best gas mileage? any ideas? I've always heard somewhere around 50-60 mph but haven't seen anything scientific.

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1994 C280
2009 VW Tiguan
1993 Toyota X-tra Cab SE-5


1973 220D ... Gone, but not forgotten
1991 Alfa Romeo 164L Gone, wife MADE me forget it

2006 Hyundai Tucson... just straight out FORGOTTEN!