ASTM D909 - 14

    Standard Test Method for Supercharge Rating of Spark-Ignition Aviation Gasoline

    Active Standard ASTM D909 | Developed by Subcommittee: D02.01

    Book of Standards Volume: 05.05


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    Significance and Use

    5.1 Supercharge method ratings can provide an indication of the rich-mixture antiknock performance of aviation gasoline in aviation piston engines.

    5.2 Supercharge method ratings are used by petroleum refiners and marketers and in commerce as a primary specification measurement to insure proper matching of fuel antiknock quality and engine requirement.

    5.3 Supercharge method ratings may be used by aviation engine and aircraft manufacturers as a specification measurement related to matching of fuels and engines.

    1. Scope

    1.1 This laboratory test method covers the quantitative determination of supercharge ratings of spark-ignition aviation gasoline. The sample fuel is tested using a standardized single cylinder, four-stroke cycle, indirect injected, liquid cooled, CFR engine run in accordance with a defined set of operating conditions.

    1.2 The supercharge rating is calculated by linear interpolation of the knock limited power of the sample compared to the knock limited power of bracketing reference fuel blends.

    1.3 The rating scale covers the range from 85 octane number to Isooctane + 6.0 mL TEL/U.S. gal.

    1.4 The values of operating conditions are stated in SI units and are considered standard. The values in parentheses are the historical inch-pound units. The standardized CFR engine measurements and reference fuel concentrations continue to be in historical units.

    1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Annex A1.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    CFR Engine Manuals

    CFRF-4Form846 Supercharge Method Aviation Gasoline Rating Unit Installation Manual

    CFRF-4Form893 Supercharge Method Aviation Gasoline Rating Unit Operation & Maintenance

    ASTM Standards

    D1193 Specification for Reagent Water

    D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Capillary Gas Chromatography

    D3237 Test Method for Lead in Gasoline by Atomic Absorption Spectroscopy

    D3341 Test Method for Lead in Gasoline--Iodine Monochloride Method

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    D4175 Terminology Relating to Petroleum, Petroleum Products, and Lubricants

    D5059 Test Methods for Lead in Gasoline by X-Ray Spectroscopy

    E344 Terminology Relating to Thermometry and Hydrometry

    E456 Terminology Relating to Quality and Statistics


    ICS Code

    ICS Number Code 75.160.20 (Liquid fuels)

    UNSPSC Code

    UNSPSC Code 15101504(Aviation fuel)


    Referencing This Standard

    DOI: 10.1520/D0909

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D909-14, Standard Test Method for Supercharge Rating of Spark-Ignition Aviation Gasoline, ASTM International, West Conshohocken, PA, 2014, www.astm.org

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