When you're searching for a new vehicle, the sticker price will probably have a big impact on which cars and trucks you consider. Keep in mind that a vehicle's fuel efficiency will also be part of your long-term ownership costs. Consider these factors when comparing gas mileage among models.
Hybrid Versus Gasoline Engines
Hybrid vehicles can offer better gas mileage than traditional models because they combine gasoline engines and electric motors, notes the U.S. Department of Energy. The 2010 vehicle receiving the agency's best fuel economy rating was the hybrid Toyota Prius, which offers 51 miles per gallon (MPG) in the city.
Engine Size
The lower the number of cylinders a vehicle has, the better the gas mileage it is likely to deliver. Smaller engines don't need as much fuel because they don't deliver as much horsepower and torque, explains the J.D. Power website. For example, a 2011 Hyundai Accent with four cylinders and a 1.6-liter engine offers a combined (city/highway) fuel mileage rating of 30 MPG. Compare that to a 2011 Chevrolet Corvette with eight cylinders and a 6.2-liter engine; its combined fuel mileage rating is 18.
City Versus Highway
You'll usually get better gas mileage when driving a vehicle on the highway because it isn't subjected to stop-and-go traffic. For example, while a 2011 Buick Lacrosse with front-wheel drive gets 30 MPG on the highway, it brings 19 MPG in city driving. The government's fuel economy website (see Resources) allows you to see estimated fuel mileage for both city and highway driving for current and past model years.
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