The 2011 Ford Mustang is the first car with 300 horsepower to also get over 30 miles per gallon, rated at 31 miles per gallon highway. Not satisfied with that, Ford took the Mustang to Bristol Motor Speedway to see just how many miles they could get out of the pony car when put to the test.

Ford aimed to run the car for 1,000 laps, or 533 miles, on just one tank of gas. Using fuel-efficient techniques like maintaining a constant speed, not starting or stopping and not running fuel drainers like air conditioning, they were able to extend the car well past its rating of 31 miles per gallon.

Five drivers took one-hour shifts with vehicle. NASCAR driver David Ragan drove the car past the 1,000 lap mark at 7:26 PM. But the new Mustang wasn’t done yet. It didn’t run out of gas until 12:41 in the morning. In total, it conquered 1,475 laps, or 776 miles, without ever refueling. Drivers kept the speed around 45 miles per hour and averaged almost 50 miles per gallon.

It wasn’t the first time Ford attempted such a stunt. Last year, they got 1,445 miles, or 81.5 miles per gallon, using the same techniques on the roads of Washington DC. Neither car was modified from its production specifications.

Those interested in a fuel-efficient vehicles might want to take a look at used Fords to save money both at the dealer and the pump.