API CK-4

API's service category for compression-ignition engines. Current category.

Name
Diesel engine oil, API CK-4 performance level
Category
Engine oil performance
Status
Current
Verified
30 August 2026

Products covered by this standard

Eni

4 products
Eni Engine oils

Petronas

13 products
Petronas Engine oils

Divinol

2 products
Divinol Engine oils

Shell

6 products
Shell Engine oils

Mobil

7 products
Mobil Engine oils
Mobil Marine lubricants
  • Mobilgard 1 HSD 5W-40

    Fully synthetic low-ash oil for high-speed marine diesel engines, API CK-4

    • Heavy-duty diesel
    • High-speed marine

    SAE 5W-40

API standards

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