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car calculation of mpg

  1. Dashboard MPG vs. Driver calculated MPG by the tank

    Crosstrek Community Discussions
    Bought my 2018 Crosstrek in August and was pleasantly surprised at the great gas mileage (around 32/33 MPG) as shown on the car's dashboard. I decided to check the numbers by calculating it the old way (if you drive 300 miles on a tank of gas and it takes 10 gallons to fill it back up, you got...