Build a Brighter Future

Convoy 15W-40 CK-4 Motor Oil

  • Enhanced shear stability
  • Superior friction reduction – improved efficiency
  • Protection against wear & corrosion
  • Long-life oil for extended drain intervals (with oil analysis)
  • Improved reduced sludge & varnish formation
  • Superior thermal & oxidation stability
  • Excellent soot control & acid neutralization
  • Greater aeration control


SKU N/A Category


Convoy 15W-40 CK-4 provides protection where the API service category CK-4 engine oil is recommended. 15w-40 CK-4 is backwards compatible to exceed the CJ-4, CI-4 Plus, CI-4 and other diesel engine specifications. The enhanced synthetic and PAO synthetic base oils provide superior all-temperature properties, while the conventional oil gives Convoy its parasynthetic name and provides seal protection for the engine’s entire drain interval.

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Additional information

Weight N/A

1 quart, 12 quarts / case, 2.5 Gal, 220 gallon mini-bulk, 5 gallons, 55 gallon drum


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Convoy® 15W-40 CK4 Motor Oil Spec Sheet