Quote:
Originally Posted by OUGrad05
That's interesting, my F30 335i is dead on accurate if not a touch conservative. When I first bought the car I tracked in fully for 6 months and compared with the onboard. The car was basically dead on or .1 or .2mpg low every time. So after dozens of fill ups I just decided the onboard was the way to go.
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I have experience of lots of different cars from MB, BMW and Audi, and BMW are definitely the manufacturer with the most accurate on-board computers. So your experience is certainly not unusual. It's good to know that my 318i is an anomaly.