Ethyl Alcohol and Gasoline as a Modern Motor Fuel 640650
An investigation is being conducted to explore the use of ethanol-gasoline blends in unmodified present-day automotive engines. Results of the program thus far show that, when 25% ethanol was used in lieu of tetraethyl lead in a catalytically cracked base gasoline, the percentage of unburned hydrocarbons in the exhaust effluent was significantly reduced. Combustion chamber deposit weights were sharply reduced with the ethanol-gasoline blends under the endurance conditions selected. Performance of the 25% ethanol blend closely approximated that of the same base gasoline blended with tel, but specific fuel consumption was generally increased at part throttle.