Reference Sequence VC Test Method

    Published: Jan 1977

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    This method describes an engine test procedure that evaluates engine oils with respect to sludge and varnish deposits produced by engine operation under a combination of low and mid-range temperatures. This test also indicates the capacity of the oil to keep positive crankcase ventilation (PCV) valves clean and functioning properly.

    Committee/Subcommittee: D02.01

    DOI: 10.1520/STP26118S

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