The new 2010 Ford Fusion has its hands full challenging the Japanese and Korean competition, but it has an ace: the 2010 Ford Fusion hybrid. Receiving its world premiere at the 2008 L.A. auto show, the Fusion gasoline/electric hybrid hits some pretty high highs: a 700-mile range on a tank of gas, 39 miles per gallon in the city, and the ability to run up to 47 mph by battery alone. The 2010 Ford Fusion hybrid uses a new 2.5-liter four-cylinder engine in tandem with the battery power. Ford claims that the 2010 Fusion hybrid is the most fuel-efficient midsize sedan in the U.S. It arrives in Ford showrooms this spring.