The Driveability Task Force of the Volatility Section of Subcommittee D02.A has requested the Coordinating Research Council to conduct a study on the volatility effects of gasoline-ethanol blends on the hot weather performance of vehicles. This extensive vehicle test program has been completed with the draft CRC report under review. Our collaboration task force is to review a ballot that would allow a +1 psi increase in the RVP maximums for gasoline-ethanol blends. The same study tested the performance of vehicles with gasoline ethanol blends having T50 distllation values down to 145F. The performance of these vehicles with such fuels was satisfactory, and the same ballot will propose a reduction in T50 miimum limts for wintertime class D and E gasoline-ethanol blends.
Keywordsalcohol; antiknock index; automotive fuel; automotive gasoline; automotive spark-ignition engine fuel; copper strip corrosion; corrosion; distillation; driveability; Driveability Index; EPA regulations; ethanol; ether; fuel; gasoline; gasoline-alcohol blend; gasoline-ethanol blend; gasoline-ether blend; gasoline-oxygenate blend; induction period; lead; leaded fuel; methanol; MTBE; octane number; octane requirement; oxidation stability; oxygenate; oxygenate detection; phase separation; phosphorous; solvent-washed gum; sulfur; TV/L = 20; unleaded fuel; vapor-liquid ratio; vapor lock; vapor pressure; volatility; water tolerance; Alcohol content; Petroleum products--specifications; Automotive engine fuels/oils--specifications;