Audi won at Le Mans with its diesel fueled engines and now it wants to return and win again only this time running its race cars on biodiesel.
From the Audi site:
On the test day at Le Mans, the V12 TDI engine of the Audi R10 used latest-generation Shell V-Power Diesel race fuel for the first time. The fuel, which is produced from biological waste materials, will make its worldwide racing début at the 24 Hours of Le Mans two weeks from now. For Audi Sport Team Joest, the race week at Le Mans will start as early as on Tuesday with Technical Scrutineering at the Place de Jacobins. After the two qualifying sessions on Wednesday and Thursday, the 76th running of the 24 Hours of Le Mans will start at 3 p.m. on 14 June.