Winner's Circle

Often referred to as "the race within the race," the MICHELIN® Green X® Challenge has a scoring system in which the smallest score wins because the goal is to provide the best racing in the world with the smallest environmental impact.

Green Challenge score = Clean + Fast + Efficient

• Clean = a measure of the oil used and greenhouse gas emissions for each car on a well-to-wheels basis
• Fast = reflects each car's speed during the race
• Efficient = the car's energy consumption divided by the car's mass

The Green Challenge scoring system is unbiased and technologically neutral; only the natural advantages of each technology and fuel are reflected in the score.

The scoring system normalizes all cars to that of the category leader’s performance and distance allowing each car to be compared to each other on a completely fair, level-playing-field basis.

15th Annual Petit Le Mans Winners

2012 MICHELIN® GREEN X® Challenge Champion: HPD / ARX-03b by Honda running on E10 with an overall score of 30.486.

2012 MICHELIN® GREEN X® Challenge Grand Touring Team Championship: Corvette Racing by Chevrolet, Class: GT (65 points)

2012 MICHELIN® GREEN X® Challenge Prototype Team Championship Team: Muscle Milk Pickett Racing by Honda, Class: P1(49 points)

2012 Green Challenge Prototype Manufacturer’s Championship: Honda (8 pts)

2012 Green Challenge Grand Touring Manufacturer's Championship: Chevrolet (27 pts)

The U.S. government recently set a goal to reduce the U.S. consumption of imported oil by one third, or 16.5 percent in total consumption, by 2025. Through the Green Racing initiatives in the ALMS, including the MICHELIN® GREEN X® Challenge, oil consumption at the 2012 race at Road Atlanta was reduced by 34.3 percent compared to the all oil-based fuels used prior to 2005. For the 2012 ALMS series to date the amount of oil savings total 37.2 percent.

HPD ARX-01c, E10

2010 Green Challenge Championship Manufacturer Award (LMP): Honda Performance Development built the most efficient race car in the LMP class, winning the Green Racing Challenge full-season championship. Coincidentally, Honda Performance Development’s HPD ARX-01c, E10 was also the vehicle that led Patron Highcroft Racing to victory in the season-long MICHELIN GREEN X Challenge.

Porsche 911 GT3 RSR

2010 Green Challenge Championship Manufacturer Award (GT): Porsche built the most efficient race car in the GT class, winning the Green Racing Challenge full-season championship. Porsche’s 911 GT3 RSRwas also the vehicle that led Flying Lizard Motorsports to victory in the season- long MICHELIN GREEN X Challenge.

2009 Green Challenge Championship Manufacturer Award (LMP): Honda/Acura won the first ever Green Challenge Championship with the most efficient vehicle in teh LMP class at the end of the season, according to scoring procedures developed by DOE and EPA.

2009 Green Challenge Championship Manufacturer Award (GT): In the GT class, Porschetook home a Green Championship Challenge trophy for the second year in a row, narrowly beating out Chevrolet for the most efficient vehicle of the 2009 ALMS racing season.

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Porsche Head of Motorsports Celebrates Winning Inaugural Green Challenge in 2008. From left to right: Scott Atherton, President and CEO of ALMS; David Schutt, Executive Vice-President of SAE International; Hartmut Kristen, Head of Motorsports, Porsche AG; Pat Davis; Margo Oge, Director of the Office of Transportation and Air Quality, U.S. EPA.