Toyota Prius Gives Best Gas Mileage

Toyota Prius 2008 uses an electric motor at start-up and at lower cruising speeds and a 1.5-liter, four-cylinder gasoline engine when accelerating or at higher speeds, for a combined 110 horsepower. It can cover 493 miles on one tank, which holds 11.9 gallons of gas. Even then, fueleconomy.gov assumes you don't allow your tank to fall below 10% full. Running closer to empty, range exceeds 500 miles.