There are numerous sites on the internet and mobile devices to help you track your fuel consumption and save on gas prices. Here are 3 of the best.

Gas Buddy. Gas Buddy is a popular site that will help you find the cheapest fuel rates in your city. Simply type in your city, state, and zip, and you’ll have access to prices all over town.

Fuelfrog. Easily track gas mileage and be alerted to any changes in your vehicle’s fuel efficiency with Fuelfrog.

AccuFuel. Looking for an app for your iPhone or iPod Touch? Try AccuFuel, which monitors your vehicle’s fuel consumption and efficiency with each fill up, and presents the data in easy to read graphs.