Global warming, urban pollution, oil reserves depletion and high cost of fossil fuels, have been the driving forces for current research on the use of alternative energy sources, particularly those deriving from biomass. Ethanol produced from different renewable feedstocks constitutes an alternative fuel for spark ignition engines. It is considered biodegradable, deriving from the use of solar energy stored in biomass, oxygenated and sulfur-free. Carbon in ethanol has a vegetable origin and, therefore, when it is released during the combustion process, it will not contribute to increase CO2 emissions