ASTM D4858-13 PDF

Scope: 5.1 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.

1.1 This test method² evaluates the performance of lubricants intended for use in two-stroke-cycle spark-ignition gasoline engines that 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.

ASTM D4858-13 Referenced Document

ASTM B152/B152M Standard Specification for Copper Sheet, Strip, Plate, and Rolled Bar
ASTM D2270 Standard Practice for Calculating Viscosity Index From Kinematic Viscosity at 40 and 100176C
ASTM D2699 Standard Test Method for Research Octane Number of Spark-Ignition Engine Fuel
ASTM D2700 Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
ASTM D2885 Standard Test Method for Research and Motor Method Octane Ratings Using On-Line Analyzers
ASTM D2896 Standard Test Method for Base Number of Petroleum Products by Potentiometric Perchloric Acid Titration
ASTM D439 Standard Specification for Automotive Gasoline
ASTM D445 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity)
ASTM D4857 Standard 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
ASTM D4863 Standard Test Method for Determination of Lubricity of Two-Stroke-Cycle Gasoline Engine Lubricants
ASTM D664 Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration
ASTM D874 Standard Test Method for Sulfated Ash from Lubricating Oils and Additives
ASTM D910 Standard Specification for Aviation Gasolines
ASTM E230 Standard Specification and Temperature-Electromotive Force (EMF) Tables for Standardized Thermocouples

2013 ASTM D4858-13 Standard Test Method for Determination of the Tendency of Lubricants to Promote Preignition in Two-Stroke-Cycle Gasoline Engines
2008 ASTM D4858-08 Standard Test Method for Determination of the Tendency of Lubricants to Promote Preignition in Two-Stroke-Cycle Gasoline Engines
2002 ASTM D4858-02 Standard Test Method for Determination of the Tendency of Lubricants to Promote Preignition in Two-Stroke-Cycle Gasoline Engines
2000 ASTM D4858-00 Standard Test Method for Determination of the Tendency of Lubricants to Promote Preignition in Two-Stroke-Cycle Gasoline Engines