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ASTM D2700

Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel

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Organization: ASTM
Publication Date: 1 January 2006
Status: inactive
Page Count: 55
ICS Code (Liquid fuels): 75.160.20
scope:

This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method may not be applicable to fuel and fuel components that are primarily oxygenates.2 The sample fuel is tested in a standardized single cylinder, four-stroke cycle, variable compression ratio, carbureted, CFR engine run in accordance with a defined set of operating conditions. The octane number scale is defined by the volumetric composition of primary reference fuel blends. The sample fuel knock intensity is compared to that of one or more primary reference fuel blends. The octane number of the primary reference fuel blend that matches the knock intensity of the sample fuel establishes the Motor octane number.

The octane number scale covers the range from 0 to 120 octane number, but this test method has a working range from 40 to 120 octane number. Typical commercial fuels produced for automotive spark-ignition engines rate in the 80 to 90 Motor octane number range. Typical commercial fuels produced for aviation spark-ignition engines rate in the 98 to 102 Motor octane number range. Testing of gasoline blend stocks or other process stream materials can produce ratings at various levels throughout the Motor octane number range.

The values of operating conditions are stated in SI units and are considered standard. The values in parentheses are the historical inch-pounds units. The standardized CFR engine measurements continue to be in inch-pound units only because of the extensive and expensive tooling that has been created for this equipment.

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 applicability of regulatory limitations prior to use. For more specific hazard statements, see Section 8, 13.4.1, 14.5.1, 15.6.1, Annex A1, A2.2.3.1, A2.2.3.3(6) and (9), A2.3.5, X3.3.7, X4.2.3.1, X4.3.4.1, X4.3.9.3, X4.3.12.4, and X4.5.1.8.

2 Research octane number, determined using Test Method D 2699, is a companion method to provide a similar but typically higher octane rating under milder operating conditions.

Document History

June 1, 2019
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v...
December 1, 2018
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v...
April 1, 2018
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v...
December 15, 2017
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v...
October 1, 2017
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v...
December 1, 2016
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v...
January 1, 2016
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v...
October 1, 2014
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v...
October 1, 2013
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v...
July 15, 2013
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v...
January 1, 2013
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v...
December 1, 2012
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v...
May 15, 2012
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method may not be...
May 1, 2011
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method may not be...
May 1, 2011
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method may not be...
October 1, 2010
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method may not be...
October 1, 2009
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method may not be...
October 1, 2009
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method may not be...
May 1, 2008
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method may not be...
December 1, 2007
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method may not be...
March 1, 2007
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method may not be...
January 15, 2007
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method may not be...
ASTM D2700
January 1, 2006
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method may not be...
December 1, 2004
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
(Footnote *) This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method...
May 1, 2004
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
(Footnote *) This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number except that this test method...

References

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