32 City / 40 Highway / 35 Combined
$21,050

The whole updated Hyundai Elantra range ranks near the top of the class in terms of efficiency. But it's the 1.5-liter-powered Elantra Eco (note: Elantra Limited pictured) that gets the highest marks, returning 32 miles per gallon in the city, 40 on the highway, and 35 combined. Owners can expect to pay $1,050 in fuel costs per year.