An Easy Way to Save Money on Gas. Get a free, easy to use gas mileage tracking form. By calculating your gas mileage each time you fill up, you’ll know if car trouble is possibly coming. If gas mileage goes down check your tires or maybe it’s time for a tune up. We also record oil changes, tire inflations and other maintenance we have done on the car.
Use the formula below to calculate your gas mileage when you fill up your tank.
Miles or kilometers driven since last fill-up
gallons or liters used.
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