The best way to save money on gasoline is to use less of it. You can do that by driving less, and by being more conscious of your car’s gas mileage. Fuelly is a handy little web application that’s easy to use from your smartphone, or your computer. It tracks your gas purchases and mileage over time and calculates miles per gallon overall and per tank.

The best part about Fuelly is comparing your car to others of the same make and model. I’ve been tracking my car’s mileage on and off since August 2009, and found that my MPG is just below the EPA estimate for my car, and the lowest of any car of its make and model in the system. Boo.

Fuelly [Official Site]

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