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The American Le Mans Series is going a little greener next season. Teams are developing Le Mans Prototype Challenge cars that use natural gas in place of traditional race fuel. According to The Washington Post, Patrick Racing is already working on a natural gas 430-horsepower Chevrolet LS3 V8 to power a 1,985-pound ORECA FLM09 chassis. Rated at 130 octane, the fuel is ideal for high-compression race engine applications.

ALMS has made it clear the series is pushing to become one of the world's most efficient by following the Environmental Protection Agency Green Racing protocols. Last year, organizers started researching both natural gas and electric systems for race teams, and while ALMS is keeping details on the Prototype Challenge program quiet at the moment, The Washington Post says that the natural-gas racers should be ready in time for the 2013 season.