Fans of the Ford Mustang are already impressed with how the car is green and a muscle car - by being the first car that gets 31MPG along with 305 horsepower.

Ford is emphasizing the efficiency of its new 2011 Mustang V6. The American automaker is promoting the Mustang 1,000 Lap Challenge, which showed how a stock production Mustang V-6 could run 1,000 laps (aka 533 miles) around Bristol Motor Speedway on a single of tank of fuel.

When the dust settled, the Mustang not only completed the challenge, but had actually went 1,457 laps (776.5 miles…