Why yes, there is an app for that
There are also apps for that. And Websites. GasBuddy.com is a great place to begin to find location-based fuel pricing information and automakers themselves now include the ability to find low fuel prices in your vehicle at the push of a button and then draw out the route for you to get there most efficiently.
Much of this is enhanced common sense driving. The shortest route between two points is usually the quickest (and most efficient). Reduce weight and drag and the engine does not have to work as hard. Keeping your vehicle in tip-top shape not only save fuel but reduces the risk of breakdown and will extend its life. Keep these tips in mind, make them habits, and you’ll be on your way to saving money at the pump, no matter what the current price.
How bad is it for your car to run on a nearly empty gas tank? HowStuffWorks takes a look under the hood.