06/12/2008 05:12 am ET Updated May 25, 2011

HotGreen Wheels: Audi Racer Uses Biofuel

With the 24 Hours of Le Mans auto race in France just around the corner, Audi and Shell, the fuel provider for Audi's race team, jointly announced that the team will be blending a small amount of biomass-to-liquid (BTL) fuel into its secret mixture. Shell's BTL fuel is made from materials such as wood chips and will make its on-track debut on Sunday, June 1, as Audi's R10 TDI begins its official Le Mans testing.

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