What's better than driving with the top down and the wind in your hair? Cruising in the open air while saving a ton of money at the pump.

The EPA has just released its figures for the 2013 Volkswagen Beetle Convertible, and the numbers don't lie. The Beetle Convertible TDI, with its 140 horsepower diesel four-cylinder, gets 21 28 miles per gallon city and 41 mpg highway when paired with the six-speed manual transmission. That highway number makes the Beetle Convertible TDI the most fuel efficient convertible in America.

Want more power and still want to save fuel? The turbocharged 2.0-liter gas engine puts out 200 horsepower while returning 21 mpg city and 30 highway.

By comparision, the Smart ForTwo Cabriolet gets 34/38, with a combined rating of 36 mpg. That's good enough to beat out the Beetle Convertible TDI's 32 combined MPG, but if you do more highway driving, no other droptop will rival the max fuel economy of the Beetle.

The Tesla Roadster, which would have been far and away the most fuel-efficient convertible on the market, is sold out and not in production in the U.S. for 2013.