PC-11 is the new diesel engine oil category which meets modern automotive industry standards. It features two new heavy duty diesel engine oil specifications: API CK-4 and FA-4.

API CK-4 will be “backward compatible” with previous categories such as API CJ-4. In contrast, API FA-4 defines a new class of low High-Temperature High Shear (HTHS) lower viscosity engine oils optimised for fuel economy. More importantly, this new category is positioned to address fuel economy, extended service and durability, i.e., “total cost of ownership”. Both API CK-4 and FA-4 oils help to maintain engine durability while improving oxidation resistance, shear stability and aeration control.

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Factors contributed to shaping these new specifications are:

  • Reduce carbon dioxide and greenhouse gas emissions
    Particulate matter and NOx emissions have improved dramatically in the last decade
  • To enhance fuel efficiency
    In particular, API FA-4 has been designed to work in conjunction with engine hardware designs with lower viscosity, fuel efficient lubricants
  • Increased fuel quality
    Most developed countries have reduced sulphur content in petrol to 10 ppm, 150 ppm for ‘regular’ unleaded petrol (91 Research Octane Number (RON) and 50 ppm for ‘Premium’ unleaded petrol (95+RON)
  • Meet latest engine technology
    New heavy duty engines can meet the latest emission standard especially for the Euro IV and V engines
  • Meet regulation requirements
    Achieving Australian government’s 2030 greenhouse gas emissions reduction target of 26-28% on 2005 levels by 2030

Performance Attributes of API Heavy Duty Oils Summary

API CK-4 category introduces an improvement in oxidation resistance, shear stability and aeration control compared to API CJ-4.

CK-4 Spider Web chart