Class 1 is summertime E85, and needs to have a minimum of 79 percent ethanol (so even E85 doesn't have to be E85). Class 2's ethanol minimum is 74. And Class 3, wintertime ethanol, is 70 percent.

The AMG One makes around half its power via its hybrid ... the Jesko engine makes 1,280 hp on standard fuel. Fill the tank with E85 ethanol though, and power will spike to 1,600 hp.

ALMS President Scott Atherton announced that the series will be adding an E85 option for spark ignition cars next year and a biodiesel fuel for the Audi R10s and the Peugeot 908s which are ...