On this episode of Engine Masters, David Freiburger of Roadkill/Roadkill Garage and Steve Dulcich of Roadkill Garage test the power differences between 118-octane race gas and E85 ethanol-blended fuel, plus engine modifications and other things. While the ethanol blend can be used for a variety of different engine designs, the test here focuses on a naturally aspirated, high-compression engine making 750 horsepower. Can you drive an engine like this on the street with E85 and save money on fuel?