Cummins Engines

Cummins heavy-duty diesel engines used in Class 8 semi trucks. Oil specifications, CES approval requirements, viscosity grades, and drain intervals for every Cummins platform.

Engine Pages

12.2L

X15

CES 20081 / 20086. 15W-40 CK-4. No FA-4.

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11.8L

X12

CES 20081. 15W-40 CK-4. No FA-4.

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15L

ISX15

CES 20081 legacy spec. 15W-40 CK-4.

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11.9L

ISX12

CES 20081. 15W-40 CK-4.

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5.9L

Cummins 5.9 (6BT / ISB)

CK-4 / CF-4 era. 15W-40. 12 qt. Covers all three generations (1989–2007). No FA-4.

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