ASTM-D4858 2008(Redline)

$26.65

D4858-08 Standard Test Method for Determination of the Tendency of Lubricants to Promote Preignition in Two-Stroke-Cycle Gasoline Engines (Redline)

Published By	Publication Date	Number of Pages
ASTM	2008	12

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Category: ASTM

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Description

Significance and Use

Two-stroke-cycle gasoline engines are generally more prone to preignition than are four-stroke-cycle engines due to the absence of the internal cooling that takes place during the induction stroke of the four-stroke-cycle engines. Preignition can lead to major piston damage, either directly due to localized overheating or as the result of preignition-induced detonation. Some lubricant additives that are widely used in four-stroke-cycle gasoline engine oils are known to increase the probability of preignition in gasoline two-stroke-cycle engines. This procedure is used to determine the tendency of an oil to induce preignition in both water-cooled and air-cooled two-stroke-cycle gasoline engines.

1. Scope

1.1 This test method evaluates the performance of lubricants intended for use in two-stroke-cycle spark-ignition gasoline engines which are prone to preignition.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 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.

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

ASTM Standards

B152/B152M Specification for Copper Sheet, Strip, Plate, and Rolled Bar D439 Specification for Automotive Gasoline D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity) D664 Test Method for Acid Number of Petroleum Products by Potentiometric Titration D874 Test Method for Sulfated Ash from Lubricating Oils and Additives D910 Specification for Aviation Gasolines D2270 Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100C D2699 Test Method for Research Octane Number of Spark-Ignition Engine Fuel D2700 Test Method for Motor Octane Number of Spark-Ignition Engine Fuel D2885 Test Method for Determination of Octane Number of Spark-Ignition Engine Fuels by On-Line Direct Comparison Technique D2896 Test Method for Base Number of Petroleum Products by Potentiometric Perchloric Acid Titration D4857 Test Method for Determination of the Ability of Lubricants to Minimize Ring Sticking and Piston Deposits in Two-Stroke-Cycle Gasoline Engines Other Than Outboards D4863 Test Method for Determination of Lubricity of Two-Stroke-Cycle Gasoline Engine Lubricants E230 Specification and Temperature-Electromotive Force (EMF) Tables for Standardized Thermocouples

ANSI Standard

ANSIMC96.1 American National Standard for Temperature Measurement Thermocouples Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.

Keywords

air-cooled; lubricant; preignition; two-cycle gasoline engine; Air-cooled gasoline engines; Combustion chamber; Dynamometer testing; Gasoline; Heating tests–petroleum products; Ignition–petroleum products; Lubricants (fluid); Lubricating oils; Performance–petroleum products/applications; Preignition; Spark plugs; Temperature tests–petroleum products; Thermocouples; Two-stroke-cycle engines; Water-cooled gasoline engines; Yamaha CE-50S test engine;

ICS Code

ICS Number Code 75.100 (Lubricants, industrial oils and related products)

DOI: 10.1520/D4858-08 ASTM International is a member of CrossRef.

ASTM D4858 (Petroleum Standards)

Citing ASTM Standards

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Additional information

Standard Title	D4858-08 Standard Test Method for Determination of the Tendency of Lubricants to Promote Preignition in Two-Stroke-Cycle Gasoline Engines (Redline)
Published Code	ASTM
Publication Date	2008
Pages Count	12

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ASTM-D4858 2008(Redline)

ASTM D4858 (Petroleum Standards)

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