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ASTM D4858 2013 Edition, June 15, 2013
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Standard Test Method for Determination of the Tendency of Lubricants to Promote Preignition in Two-Stroke-Cycle Gasoline Engines
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This test method2 evaluates the performance of lubricants intended for use in two-stroke-cycle spark-ignition gasoline engines that are prone to preignition.

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

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 Until the next revision of this test method, the ASTM Test Monitoring Center will update changes in this test method by means of Information Letters. These can be obtained from theASTM Test Monitoring Center, 6555 PennAve., Pittsburgh, PA 15206-4489. Attention: Administrator. This edition incorporates revisions in all Information Letters through No. 01–3.

*A Summary of Changes section appears at the end of this standard