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	The 288-hour VE engine oil performance test at SwRI simulates stop-and-go urban and moderate freeway driving.

The Sequence VE procedure, ASTM D 5302, simulates moderate-temperature taxicab service, urban and suburban delivery service, and job-commuting service, and it screens crankcase oils for cylinder bore and piston ring wear in:

• Methanol-fueled engines

• Ethanol-fueled engines

• Natural gas-fueled engines

Engine oil category specifications for the Sequence VE test are:

• API SG

• API SH

• API SI

• ILSAC GF-1

• ILSAC GF-2

• ILSAC GF-3

• MIL-L-21260D

• MIL-L-46167B

Sequence VE Test Equipment and Procedure

A fuel-injected Ford 2.3-liter gasoline engine, 4-cylinder, with sliding followers, overhead camshaft, coolant-jacketed rocker cover, and camshaft baffle is used for this test.

The test is a 288-hour test with 72 cycles, with each cycle consisting of 3 differing operating specifications or stages. Unleaded Phillips J fuel is used, and engine blowby is intentionally increased. Rocker cover jacket temperature is cycled.

Sequence VE Test Results

At the end of the test, sludge deposits are rated on:

• Rocker arm cover

• Cam baffle

• Valve deck

• Front seal housing

• Cylinder block

• Oil pan

The following are rated for varnish deposits:

• Piston skirts

• Rocker arm covers

• Cam baffles

• Cylinder walls

• Oil pan

Inspections are performed for hot stuck piston compression rings.

The following are rated for clogging:

• Oil pump screen

• Piston oil rings

• Camshaft oil feed holes

Measurements are taken for:

• Cam lobe wear

• Weight loss of follower arms

Used lubricant analysis includes:

• Kinematic viscosity

• Iron content

• Copper content

• Silicon content

• Pentane insolubles

• Fuel dilution

Sequence VE Pass / Fail Criteria

	Pass/fail results of Sequence VE procedure
	Pass/fail results of Sequence VE procedure (above and left)

For more information about the Sequence VE (ASTM D 5302) procedure, or how you can contract with Southwest Research Institute (SwRI), please contact Dan Worcester at dworcester@swri.org or (210) 522-2405.

sequenceve.swri.org

| Engine Lubricants Research Department | Fuels and Lubricants Research Division | SwRI Home |

Southwest Research Institute^® (SwRI^®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 11 technical divisions.

December 28, 2012