ASTM D2700-04a

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An American National Standard
Designation: D 2700 – 04a
Designation: 236/87
Standard Test Method for
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Motor Octane Number of Spark-Ignition Engine Fuel
This standard is issued under the fixed designation D2700; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope* bility of regulatory limitations prior to use. For more specific
hazard statements, see Section 8, 13.4.1, 14.5.1, 15.6.1,Annex
1.1 This laboratory test method covers the quantitative
A1,A2.3.9,A2.4.8,A3.2.7.2(7),A4.2.3.1,A4.2.3.3(6) and (9),
determination of the knock rating of liquid spark-ignition
A4.3.5, X2.3.7, X3.2.3.1, X3.3.4.1, X3.3.9.3, X3.3.12.4, and
engine fuel in terms of Motor octane number except that this
X3.5.1.8.
testmethodmaynotbeapplicabletofuelandfuelcomponents
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that are primarily oxygenates. The sample fuel is tested in a
2. Referenced Documents
standardized single cylinder, four-stroke cycle, variable com-
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2.1 ASTM Standards:
pression ratio, carbureted, CFR engine run in accordance with
D1193 Specification for Reagent Water
a defined set of operating conditions.The octane number scale
D1744 Test Method for Water in Liquid Petroleum Prod-
is defined by the volumetric composition of primary reference
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ucts by Karl Fischer Reagent
fuel blends. The sample fuel knock intensity is compared to
D2268 Test Method forAnalysis of High-Purity n-Heptane
that of one or more primary reference fuel blends. The octane
and Isooctane by Capillary Gas Chromatography
number of the primary reference fuel blend that matches the
D2360 Test Method for Trace Impurities in Monocyclic
knockintensityofthesamplefuelestablishestheMotoroctane
Aromatic Hydrocarbons by Gas Chromatography
number.
D2699 Test Method for Research Octane Number of
1.2 Theoctanenumberscalecoverstherangefrom0to120
Spark-Ignition Engine Fuel
octane number, but this test method has a working range from
D2885 Test Method for Determination of Octane Number
40 to 120 octane number. Typical commercial fuels produced
of Spark-Ignition Engine Fuels by On-Line Direct Com-
for automotive spark-ignition engines rate in the 80 to 90
parison Technique
Motor octane number range. Typical commercial fuels pro-
D3703 Test Method for Peroxide Number of Aviation
duced for aviation spark-ignition engines rate in the 98 to 102
Turbine Fuels
Motor octane number range. Testing of gasoline blend stocks
D4057 Practice for Manual Sampling of Petroleum and
orotherprocessstreammaterialscanproduceratingsatvarious
Petroleum Products
levels throughout the Motor octane number range.
D4175 Terminology Relating to Petroleum, Petroleum
1.3 The values of operating conditions are stated in SI units
Products, and Lubricants
and are considered standard. The values in parentheses are the
D4177 Practice for Automatic Sampling of Petroleum and
historical inch-pounds units. The standardized CFR engine
Petroleum Products
measurements continue to be in inch-pound units only because
D4814 SpecificationforAutomotiveSpark-IgnitionEngine
oftheextensiveandexpensivetoolingthathasbeencreatedfor
Fuel
this equipment.
D5842 Practice for Sampling and Handling of Fuels for
1.4 This standard does not purport to address all of the
Volatility Measurement
safety concerns, if any, associated with its use. It is the
E1 Specification forASTM Liquid-in-GlassThermometers
responsibility of the user of this standard to establish appro-
E456 Terminology for Relating to Quality and Statistics
priate safety and health practices and determine the applica-
E542 Practice for Calibration of Laboratory Volumetric
Apparatus
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This test method is under the jurisdiction of ASTM Committee D02 on
PetroleumProductsandLubricantsandisthedirectresponsibilityofSubcommittee
D02.01 on Combustion Characteristics.
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Current edition approved Dec. 1, 2004. Published December 2004. Originally For referenced ASTM standards, visit the ASTM website, www.astm.org, or
approved in 1968. Last previous edition approved in 2004 as D2700–04. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Research octane number, determined using Test Method D2699, is a compan- Standards volume information, refer to the standard’s Document Summary page on
ion method to provide a similar but typically higher octane rating under milder the ASTM website.
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operating conditions. Withdrawn.
*A Summary of Changes section appears at the end of this standard.
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D 2700 – 04a
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2.2 ANSI Standard: orric
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