Any H fuel cell car, totally gas free and it doesn't take coal power to charge like an electric car
A bicycle!
The most fuel efficient vehicle on the road as of the present is the Toyota Prius. National statistics state that consumers are extremely happy with this vehicle.
The most fuel efficient SUV today is the 2012 Ford Escape Hybrid. Ford's Escape Hybrid was designed to get the most out of each drop of gas put into the vehicle to ensure the customer would spend more time driving and less time refueling. Since the it is a hybrid one of the engineers main focuses was making the SUV fuel efficient.
A very small vehicle with a small engine is most likely to use less fuel.
Most modern vehicles can up to 3 or 4 times more efficient than vehicles fifty years ago, depending on the type of vehicle.
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The 7 passenger Toyota RA4
The Toyota Yaris and the Honda Fit are rated among the best fuel efficnet cars. Additional information follows: www.newcars.com/green/fuel-efficient/index.html
The Ford Escape Hybrid is the most fuel efficient SUV,.It gets 34 highway and 31 city with seating for five. The Mercury Mariner vehicle is mechanically the same vehicle and gets the same fuel economy.
The most fuel efficient vehicles on the market today are usually hybrids. However, many small and economy sized vehicles on the market are not hybrids but are very fuel efficient as well.
hybrid
People often think of compact cars when they consider fuel efficient cars. But there are many midsize cars and SUVs that are fuel efficient. In choosing a car that will have good gas mileage, also consider the size of the engine and the vehicle size. An engine that is too small for the size of the vehicle may save you on fuel but cost more on engine repair or replacement.