ASTM D2700-08 PDF

Standard No.: ASTM D2700-08
Release Date: 2008
Published By: American Society for Testing and Materials (ASTM)
Status: Be replaced
Replace By: ASTM D2700-09
Latest: ASTM D2700-24

Scope

Motor O.N. correlates with commercial automotive spark-ignition engine antiknock performance under severe conditions of operation.

Motor O.N. is used by engine manufacturers, petroleum refiners and marketers, and in commerce as a primary specification measurement related to the matching of fuels and engines.

Empirical correlations that permit calculation of automotive antiknock performance are based on the general equation:

Values of k₁, k₂, and k₃ vary with vehicles and vehicle populations and are based on road-octane number determinations.

Motor O.N., in conjunction with Research O.N., defines the antiknock index of automotive spark-ignition engine fuels, in accordance with Specification D 4814. The antiknock index of a fuel approximates the road octane ratings for many vehicles, is posted on retail dispensing pumps in the United States, and is referred to in vehicle manuals.

This is more commonly presented as:

Motor O.N. is used for measuring the antiknock performance of spark-ignition engine fuels that contain oxygenates.

Motor O.N. is important in relation to the specifications for spark-ignition engine fuels used in stationary and other nonautomotive engine applications.

Motor O.N. is utilized to determine, by correlation equation, the Aviation method O.N. or performance number (lean-mixture aviation rating) of aviation spark-ignition engine fuel.

1.1 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. 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.

1.2 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.

1.3 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.

1.4 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. 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.......

ASTM D2700-08 history

2024 ASTM D2700-24 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2024 ASTM D2700-23b Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2023 ASTM D2700-23a Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2023 ASTM D2700-23 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2022 ASTM D2700-22b Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2022 ASTM D2700-22a Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2022 ASTM D2700-22 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2021 ASTM D2700-21 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2019 ASTM D2700-19e1 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2019 ASTM D2700-19 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2018 ASTM D2700-18a Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2018 ASTM D2700-18 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2017 ASTM D2700-17a Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2017 ASTM D2700-17 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2016 ASTM D2700-16a Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2016 ASTM D2700-16 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2014 ASTM D2700-14 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2013 ASTM D2700-13b Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2013 ASTM D2700-13a Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2013 ASTM D2700-13 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2012 ASTM D2700-12a Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2012 ASTM D2700-12 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2011 ASTM D2700-11e1 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2011 ASTM D2700-11 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2010 ASTM D2700-10 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2009 ASTM D2700-09 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2008 ASTM D2700-08 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2007 ASTM D2700-07b Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2007 ASTM D2700-07a Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2007 ASTM D2700-07 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2006 ASTM D2700-06 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2004 ASTM D2700-04a Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2004 ASTM D2700-04e1 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2004 ASTM D2700-04 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2003 ASTM D2700-03b Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2003 ASTM D2700-03a Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2003 ASTM D2700-03 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2002 ASTM D2700-02 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2001 ASTM D2700-01a Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
2001 ASTM D2700-01 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
1999 ASTM D2700-99 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
1992 ASTM D2700-92 Standard Test Method for Knock Characteristics of Motor and Aviation Fuels by the Motor Method

ASTM D2700-08Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel

ASTM D2700-08 history

ASTM D2700-08
Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel