Published: Jan 2010
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AUTOMOTIVE SPARK-IGNITION ENGINE FUEL consists of gasoline or gasoline-oxygenate blends used in internal combustion spark-ignition engines, as opposed to engine fuels used in diesel or compression-ignition engines. These spark-ignition engine fuels are used primarily in passenger car and highway truck service. They are also used in off-highway utility trucks, farm machinery, two- and four-stroke cycle marine engines, and other spark-ignition engines used in a variety of service applications. ASTM D4814, Specification for Automotive Spark-Ignition Engine Fuel, defines gasoline as a volatile mixture of liquid hydrocarbons, containing small amounts of additives. A gasoline-oxygenate blend is defined as a fuel consisting primarily of gasoline, along with a substantial amount of one or more oxygenates. An oxygenate is an oxygen-containing, ashless organic compound, such as an alcohol or ether, which can be used as a fuel or fuel supplement. Ethanol is the predominant oxygenate in use today. Spark-ignition engine fuel includes both gasolines and gasoline-oxygenate blends. Gasoline is a complex mixture of relatively volatile hydrocarbons that vary widely in their physical and chemical properties. It is a blend of many hydrocarbons derived from the fractional distillation of crude petroleum and from complex refinery processes that increase either the amount or the quality of gasoline.
Gibbs, Lewis M.
Chevron Products Company, Richmond, CA
Bonazza, Ben R.
TI Automotive, Lapeer, MI
Furey, Robert L.
Furey & Associates, LLC, Rochester Hills, MI