Calculate your miles per gallon
Fill up your gas tank and set the trip odometer button on the instrument panel to zero, then drive normally until it’s time to stop for gas again. When you next refuel, note the trip odometer reading to get the number of miles you’ve driven. Alternatively, you can get this figure by writing down the overall odometer reading the first time you fill up and again the second time, with the difference being your miles driven. Next, divide the mileage by the number of gallons of fuel you pumped on the second gas stop to get your miles per gallon.