Improperly inflated tires is a real culprit when it comes to stealing gasoline. Make sure your tires are properly inflated. Use cruise control on the highway. This will keep your gas flowing to your engine at a steady pace, rather than speeding up and slowing down continuously. That is a waste of gas. Keep your engine properly tuned. A poorly tuned engine doesn't burn all the gasoline, and it spews pollution into the air while taking money out of your wallet to do so.
There are many more tips for you to consider. Call your dealer. Your dealer will be happy to show you other tips on saving gas.