Quote:
Originally Posted by leatherpants
FWIW, my car has iDrive and I do a reset w/ every new tank of gas-
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Me too. The numbers I have reported were manual calculations for one or more consecutive tanks of gas. I think you need to have a significant number of miles on the trip computer for it to be half-way accurate. I have about 50 miles on my current tank and the mpg readout still changed by 0.9 mpg just on the 7 mile drive home from work. Even for a full tank, with over 200 miles, I have found the computer mpg is about 0.5 mpg higher than a manual calculation.