ISO 5164:2014
Petroleum products - Determination of knock characteristics of motor fuels - Research method

Standard No.

ISO 5164:2014

Release Date

2014

Published By

International Organization for Standardization (ISO)

Latest

ISO 5164:2014

Scope

This International Standard establishes the rating of liquid spark-ignition engine fuel in terms of an arbitrary scale of octane numbers using a standard single-cylinder, four-stroke cycle, variable compression ratio, carburetted, CFR engine operated at constant speed. Research octane number (RON) provides a measure of the knock characteristics of motor fuels in automotive engines under mild conditions of operation. This International Standard is applicable for the entire scale range from 0 RON to 120 RON, but the working range is 40 RON to 120 RON. Typical motor fuel testing is in the range of 88 RON to 101 RON. This International Standard is applicable for oxygenate-containing fuels containing up to 4,0 % (m/m) oxygen and for gasoline containing up to 25 %(V/V) ethanol. NOTE 1 Although 25 % (V/V) of ethanol corresponds to approximately 9 % (m/m) oxygen, full applicability of this test method for that oxygen range has only been checked for gasoline type of fuels. NOTE 2 Work is under way to check the possibility to use the method up to and including 85 %(V/V) ethanol. NOTE 3 This International Standard specifies operating conditions in SI units but engine measurements may be specified in inch-pound units because these were the units used in the manufacture of the equipment, and thus some references in this International Standard include these units in parenthesis. NOTE 4 For the purposes of this standard, the terms “% (m/m)” and “% (V/V)” are used to represent the mass fraction, µ, and the volume fraction, φ, of a material respectively.

ISO 5164:2014 Referenced Document

• ASTM D2699-12 Standard Test Method for Research Octane Number of Spark-Ignition Engine Fuel*， 2024-04-20 Update
• ASTM D2700-13 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel*， 2024-04-20 Update
• ISO 3170:2004 Petroleum liquids - Manual sampling
• ISO 3171:1988 Petroleum liquids; automatic pipeline sampling
• ISO 3696:1987 Water for analytical laboratory use; Specification and test methods
• ISO 4787:2010 Laboratory glassware - Volumetric instruments - Methods for testing of capacity and for use

ISO 5164:2014 history

• 2014 ISO 5164:2014 Petroleum products - Determination of knock characteristics of motor fuels - Research method
• 2005 ISO 5164:2005 Petroleum products - Determination of knock characteristics of motor fuels - Research method
• 1990 ISO 5164:1990 Motor fuels; determination of knock characteristics; research method
• 1977 ISO 5164:1977 Motor fuels — Determination of knock characteristics — Research method