Mileage Keeper!

Mileage Keeper tracks your vehicles fuel economy, which helps you save money Mileage Keeper is simple to use. Just enter your odometer reading and fuel amount for each refueling, Mileage Keeper does the rest Enter the total cost for each refueling, and Mileage Keeper will then also track cost/gallon (or litre) and the total amount spent on fuel for each vehicle. Best of all, its free