Corn ethanol is not compatible with most engine types. Most types of engines in existence today are built to run on some types of refined petroleum products. Here in the United States, most engines are designed to run on unleaded gasoline, followed by those engines designed to run on diesel fuel.
Corn ethanol is not compatible with most engine types for these reasons. The amount of moisture, specifically, water, in corn ethanol is much higher than in a petroleum fuel. Two corn ethanol's octane rating needs to be significantly higher in order for combustion to occur, and the electronic equipment calibration is different because of this and, the engines rust from the inside out.