Automakers are pulling out all the stops in an effort to raise fuel economy, but Ford may be taking the most drastic step yet – introducing a three-cylinder engine.

Ford isn't the first automaker to offer a three-cylinder engine – they were last seen on Suzuki Swifts and Chevrolet Metros in the 1990s. However, the planned reintroduction of the engine in the U.S., likely set for next year, will come as a shock to many, as most accepted that an automaker wouldn't go lower then four cylinders in a mass production vehicle again.

The three cylinders will allow Ford to achieve a higher MPG rating. In fact, it may allow the automaker to get 50 miles per gallon – unheard of for a gas-powered car.

"Consumers are telling us they want to buy affordable vehicles that get many more miles per gallon," said Derrick Kuzak, global product development chief. "Our new 1-liter EcoBoost engine will give consumers looking for hybrid-like fuel economy a new, more affordable choice."

Ford has been mum with the details, but it's likely that the compact Fiesta will be the recipient of the smaller engine.

Drivers interested in a high-MPG vehicle may want to consider New Jersey State Auto Auction, which offers a wide range of cars for sale at affordable prices.