Clearly, there's a bit more to the hybrid-versus-diesel argument than which is king of the economy rallies. Toyota has announced a plan to return to the legendary Le Mans 24-hour race next year with a petrol-electric racing car built to the event's top LMP1 specification.
Le Mans is dominated by diesel-powered racing cars. Since 2006, Audi has won six times with its R-series machines, while arch rival Peugeot took the big prize in 2009 with the 908 HDi FAP.
Toyota's new LMP1 chassis will be created by Toyota Motorsport in Germany, but equipped with a hybrid petrol powertrain engineered by Toyota in Japan. The car will be rolled out early next year for pre-season testing.
Tadashi Yamashina, Toyota Motor Corp senior managing officer and Toyota Motorsport chairman, said: "Toyota has entered Le Mans before but, by using our hybrid technology, this time will be a completely new challenge.
"We want to write a new chapter in the history of the Le Mans 24 Hours, as in the FIA World Endurance Championship, through our use of hybrid technology.