40 mpg. Through the 2010 model year, there still weren't any non-hybrid gasoline-powered vehicles that reached the 40-mpg mark. That's all changed for 2011, with the addition of the 2011 Ford Fiesta, which hits 40 mpg when specially equipped, and the 2011 Chevrolet Cruze Eco, which earns a 42-mpg highway rating. Then Hyundai pulled a coup, with its entire 2011 Hyundai Elantra lineup carrying a 40-mpg EPA highway rating. But with 40 mpg expected from some 2012 Ford Focus models, Hyundai's Veloster sporty compact, and probably several other models, expect to recalibrate what you think of as fuel-efficient. The news was good all around, though, with mileage mattering even in muscle machines like the 31-mpg Ford Mustang.