1.1 This test method covers a procedure for determination of the merit of dispersancy of diesel crankcase engine oils as well as other types of engine oils in which pollutants of diverse sources such as soot from combustion, metallic particles from wear, corrosion of mechanical parts, and insoluble products resulting from the oxidation of the oil may contaminate the lubricant. 1.2 The values stated in SI units are to be regarded as the 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. Note 1 It is not the intent of this test method to establish or recommend normal, cautionary, warning or alert limits for any machinery. Such limits should be established in conjunction with advice and guidance from the machinery manufacturer and maintenance group.
The spot or blotter method is an old analytical technique that has been practiced for many years. This test method serves to standardize this existing practice with specific instrumentation to reduce or eliminate the subjectivity of the current technique. This instrumentation and procedure is already in practice worldwide at more than 50 laboratories and a reference method has been requested by the in-serice lubricant industry.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Ballot Item Approved as D7899-2013 and Pending Publication