Armstrong World Industries ACUM185, ACUM84, ACUM140, ACUM65, ACUM110, ACUM210 Obsolete. Do Not

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The use of quality engine lubricating oils, combined with appropriate oil drain and filter change intervals, is a critical factor in maintaining engine performance and durability.

Cummins Inc. recommends the use of high-quality SAE 15W-40 heavy-duty engine oil, such as Valvoline® Premium Blue®, which meets performance specifications as listed below.

Cummins Engineering Stan-	American Petroleum Institute	International Classifications	Comments
dard Classification (CES)	Classification (API)
	API CD API CE API CG-4/SH	ACEA E-1	OBSOLETE. DO NOT
			USE.
CES-20075	API CF-4/SG	ACEA E-2 ACEA E-3 JAMA	Minimum acceptable oil classi-
		DH-1	fication for midrange engines.
CES-20071 CES-20076	API CH-4/SJ API CH-4	Global DHD-1	Acceptable oil classification
			for midrange engines.
			Similar in performance to
			CES-20071 but validated un-
CES-20072 CES-20077	API CH-4	ACEA E-5 Global DHD-1	der European test standards.
			Excellent oil for midrange
			engines.
CES-20078	API CI-4/SK API CI-4		Excellent oil for midrange
			engines.

NOTE: In areas where CH-4/SJ or CG-4/SH oils are not available, refer to Oil Drain Intervals in Section 2.

A sulfated ash limit of 1.0 mass percent is suggested for optimum valve and piston deposit and oil consumption control.

As the engine oil becomes contaminated, essential oil additives are depleted. Lubricating oils protect the engine as long as these additives are functioning properly. Progressive contamination of the oil between oil and filter change intervals is normal. The amount of contamination will vary depending on the operation of the engine, kilometers or miles on the oil, fuel consumed, and new oil added.

Extending oil and filter change intervals beyond the recommendations will decrease engine life due to factors such as corrosion, deposits, and wear.

Special “break-in” engine lubricating oils are not recommended for new or rebuilt Cummins engines. Use the same type of oil during the break-in as is used in normal operation.

The use of low-viscosity oils, such as 10W or 10W-30, can be used to aid in starting the engine and in providing sufficient oil flow at ambient temperatures below -5°C [23°F]. However, continuous use of low-viscosity oils can decrease engine life due to wear. Refer to the accompanying chart.

If an engine is operated in ambient temperatures consistently below -23°C [-9°F] and there are no provisions to keep the engine warm when it is not in operation, use a synthetic CH/SI or CH/SK or higher API classification engine oil with ade- quate low-temperature properties such as 5W-20 or 5W-30.

The oil supplier is responsible for meeting the performance service specifications represented with its product.

Use low-silicate antifreeze that meets ASTM4985 (GM6038M specification) criteria. Fully formulated coolant must meet ASTM D-6210/D-6211. Cummins Inc. recommends using either a 50/50 mixture of good-quality water and fully formu- lated antifreeze, or fully formulated coolant when filling the cooling system.

Good-quality water is important for cooling system performance. Excessive levels of calcium and magnesium contribute to scaling problems, and excessive levels of chlorides and sulfates cause cooling system corrosion.

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