A nice little resource for finding out real world fuel mileage is this site: fuelly.com
Got to "browse vehicles" (sometimes at the very bottom of the page) and find what you're researching.
Tried to register,They want more info than any site I ever visited.Plus it would not let me get past the "I'm not a robot" box. Something is fishy ,considering all a person wants to do is find average fuel mileage
