When the grueling 2013 Rolex 24 endurance race kicks off at Daytona International Speedway on Jan. 26, the field will include three Mazda6 race cars powered by an unusual type of renewable fuel.
When the grueling 2013 Rolex 24 endurance race kicks off at Daytona International Speedway on Jan. 26, the field will include three Mazda6 race cars powered by an unusual type of renewable fuel.