Sequence VG Test Method
The Sequence VG engine sludge and varnish deposit test is a fired engine-dynamometer test that evaluates the ability of a lubricant to minimize the formation of sludge and varnish deposits.
The Sequence VG test is a cyclic test, with a total running duration of 216 hours, consisting of 54 cycles of 4 hours each. The test engine is a Ford 4.6L, spark ignition, four stroke, eight cylinder "V" configuration engine. Features of this engine include dual overhead camshafts, a cross-flow fast burn cylinder head design, two valves per cylinder, and electronic port fuel injection. A 90-minute break-in schedule is conducted prior to each test, since a new engine build is used for each test. Upon test completion, the engine is disassembled and rated for sludge and varnish. Average engine sludge and average engine varnish are calculated.
Engine wear evaluations, and additional lubricant testing services:
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