Vehicles with high gas mileage ratings in both city and highway driving include Smart Fortwo, BMW i3 BEV, Fiat 500e, Volkswagen e-Gulf, Nissan Leaf, Tesla Model S with AWD and Toyota Prius. Some use combination fuel technologies of gasoline and electric, which achieves over 100 miles per gallon, according to statistics at fueleconomy.gov, with the exception of the Toyota Prius, which averages 42 MPG using regular gasoline.
The aptly-named Smartcar Fortwo carries two passengers. It comes in two body styles: coupe and convertible. These cars vary slightly in body styling and design, but share a combined gas mileage of 107.
The top fuel savers in the minicompact and compact classes are the Fiat 500e and the Volkswagen e-Gulf, respectively. Both vehicles have a combined MPG rating of 116. The BMW i3 BEV stands out among competitors in the subcompact class with a combined MPG of 124. The Nissan Leaf gets an average of 114 MPG, which is the highest among other cars in its midsize class.
For large cars, the Tesla Model S leads with an average of 101 MPG. The Kia Soul Electric, a small station wagon, averages 105 MPG, while the gas-powered Toyota Prius, a mid-sized wagon, gets 42 MPG, notes fueleconomy.gov.