NASCAR and environmental change rarely are seen together, but that's exactly what's happening during this year's NASCAR season. For the first time, the nation's most popular motorsport is using a blend of 15 percent ethanol in all its cars. In “Corn-Fueled Cars,” Correspondent Lee Patrick Sullivan takes a look at how the organization and its drivers are adapting to the new fuel, and how it's paying off in performance.

Lee Patrick visits Pit Road at the Daytona 500, where his cousin, Scott Wood, gasses up driver Denny Hamlin's car with the new fuel. He also talks to driver Clint Bowyer, who tells him how E15 could be making his car and others even faster.

The fuel is blended at Sunoco's Marcus Hook refinery near Philadelphia, and Lee Patrick is on hand to see workers there truck it out to every track on the NASCAR circuit. He interviews the man who designed the special can used to dispense the fuel at the tracks. Mark Borosky's closed system keeps the fuel from absorbing moisture from the air, which would cause it to separate and possibly damage the cars' engines.

Lee Patrick also heads to the world's most famous speedway in Indianapolis. Indy car drivers at the Brickyard have been running on 100 percent ethanol for years. He speaks with IRL driver and team owner Sarah Fisher, who tells him how it works for her circuit.

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