The Nov.-Dec. newsletter of the Ethanol Producers and Consumers (EPAC) reported on a study by the Minnesota State University at Mankato. The students drove a Prius and gradually increased the amount of alcohol in the gas until they were using 85% alcohol (E85). They didn't modify the fuel system or the engine. They report that the engine showed gains in horsepower and torque and significantly reduced tailpipe emmissions. I don't know if mpg was affected. They said there were no engine problems. For more information,visit: www. creedproject.org.