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    Discussion on Uses of the Specification for Ethanol Fuel Blends (ASTM D5798)

    Published: Jun 2016

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    Ethanol debuted as the primary component in certain motor fuel blends in the early 1990s. These high-ethanol content fuel blends are restricted for use in flexible-fuel vehicles (FFVs), sometimes referred to as “dual-fueled vehicles” or “variable fuel vehicles.” A FFV is one that can operate on gasoline containing no ethanol, fuel blends of 85 % by volume denatured fuel ethanol, or any combination of the two. Describing the performance and compositional characteristics for a predominantly ethanol motor fuel is the goal of ASTM D5798, Standard Specification for Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-Ignition Engines (Specification D5798 or more simply D5798). Specification D5798 contains the necessary details to blend a fit-for-purpose motor fuel for FFVs while providing guidance on regulatory requirements for alternative fuels and identification of key considerations to ensure acceptable performance for consumers.


    ASTM D5798, denatured fuel ethanol, blending gasoline

    Author Information:

    Moore, Kristin A.
    KMoore Consulting LLC, Heyworth, IL

    Committee/Subcommittee: D02.A0

    DOI: 10.1520/MNL6920150017