ASTM WK72772

    New Test Method for Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IVB Spark-Ignition Engine

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    Developed by Subcommittee: D02.B0 | Committee D02 | Contact Staff Manager


    1. Scope

    1.1 This test method measures the ability of an engine crankcase oil to control valve-train wear in spark-ignition engines at low operating temperature conditions. This test method is designed to simulate extended engine cyclic vehicle operation. The Sequence IVB Test Method uses a Toyota 2NR-FE water cooled, 4 cycle, in-line cylinder, 1.5L engine. The primary result is bucket lifter wear. Secondary results include cam lobe nose wear and measurement of iron (Fe) wear metal concentration in the used engine oil. Other determinations such as fuel dilution of the crankcase oil, non-ferrous wear metal concentrations, total fuel consumption, and total oil consumption, can be useful in the assessment of the validity of the test results. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.2.1 ExceptionsWhere there is no direct SI equivalent such as pipe fittings, tubing, NPT screw threads/diameters, or single source equipment specified. 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. Specific warning statements are provided throughout this document as necessary in each particular section.


    Sequence IVB; Oil Certification Test; Passenger Car Engine Oil Certification; GF-6; API SN;


    New Sequence IVB Test Method, A new passenger car engine oil classification has been approved and this is a new standard.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    Sidney Clark