Quote:
Originally Posted by bryan1980
trip computer is wildly optimistic, with the real figures coming in around 1-2 mpg lower than what's indicated.
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Correct for incorrect miles due to tire being some percent different than the trip computer was calibrated for. Maybe possible differences due to short trips & many cool downs for a given tank of gas. Possibly, the use of 100% ethanol-free gasoline instead of 10% ethanol blends may cause differences.