What type of oil should be used for Cummins engines?

1 Answers
SanKaylee
07/30/25 7:48am
Here is an introduction to the oil types used for Cummins engines: Environment above -5°C: When the ambient temperature is above -5°C, use 15W-40 CF4, CG4, CF4/SG, or CG4/SH grade oil. Environment below -5°C: When the ambient temperature is below -5°C, use 10W-30 CF4, CG4, CF4/SG, or CG4/SH grade oil. For B and C series engines, CF4/SG or CG4/SH grade oil must be used. "Blue Supreme" oil: Cummins recommends using "Blue Supreme" oil. This brand of oil has a viscosity index of 15W-40 and a performance grade of CG4/SH. The additive formulation is specifically designed according to the unique performance characteristics of Cummins engines, effectively extending the oil change interval and reducing oil consumption rate.
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