2005 Chevrolet Impala
Score one for the big dog. The only large car to make it onto our list, the Chevrolet Impala achieves a desirable 32-mpg on the highway. To attain this lofty rating yourself, you’ll need to order your Impala with the 3.4-liter V6 engine and four-speed automatic transmission. Passenger volume is a generous 105 cubic feet, but at about $23,000, it will take a few more bills out of your wallet.