Quote:
Originally Posted by autodahn
Well, all I can say is I just drove my xDrive50i home from Spartanburg and got an indicated 20.8 mpg on the highway! I haven't done much city driving yet, so I will keep you posted. BTW, my dealer's service rep says the computer is "pretty accurate" even though BMWs overestimate speed up to 100 mph, then underestimate 100+ (so that 100 mph is dead on). Can anybody else verify this? Cheers! Ad
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How did you measure 20.8?
I have found dividing gallons used by miles driven the best way to measure. The onbaord computer on the gauge display is fairly accurate. The trip computer one can be 3-5 miles on the high side.