10. 2013 Toyota (TM - Get Report) Prius Plug-In
Miles per gallon: First 11 miles: 95 mpge combined. Next 529 miles: 50 mpg combined
Fortunately, the Prius makes up for its somewhat gimmicky electric mileage with the 50 mpg hybrid mileage owners have come to know and love. It also gets owners some sweet state and federal rebates for their trouble, as well as an occasional comfy solo ride in the carpool lane.