Gas Mileage Tracker is a MPG (miles per gallon) program designed to help you understand and track your gas mileage and gasoline usage. You can track your total miles and gas mileage, your total highway miles and highway gas mileage, as well as your city miles and city gas mileage. You will have a record on when you filled up on gas, how many miles you got in a given tank, how much you spent, and what your MPG was...