API CK-4 Oils

API CK-4 describes oils for use in diesel engines designed to meet 2017 model year on-road and Tier 4 non-road exhaust emission standards, as well as for previous model year diesel engines.

API CK-4 will offer backwards compatibility to the previous categories (CJ-4, CI-4+, etc), allowing use in the vast majority of older diesel engine vehicles while offering increased performance and protection gains, as well as extending the intervals required between oils changes.

What are the performance advantages?

These oils are designed to provide enhanced protection against oxidation, viscosity loss due to shearing, and oil aeration as well as protection against catalyst poisoning, particulate filter blocking, engine wear, piston deposits, degradation of low- and high-temperature properties, and soot-related viscosity increase.

API CK-4 oils are especially effective at sustaining emission control system durability where particulate filters and other advanced after-treatment systems are used.

PC-11 will not affect every business the same and some may only see a small impact. For example, a business that operates with older equipment and different engine types may simply need to transition from the current API CJ-4 oils to CK-4 oils. This is most likely to apply to off-road fleets used in environments such as mining and construction.

At Petro-Canada Lubricants, we see this as not only an opportunity to improve the efficiency and carbon footprint of businesses, but also a chance to recognize the potential to cut costs and increase the profitability of operations. As with all business decisions, clear understanding and early adoption could result in a genuine competitive edge.

For those businesses with a mix of older and newer equipment and an ambition to realize the improvements that will come with PC-11, then a stock of both API CK-4 and FA-4 products may be best.


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At Petro-Canada Lubricants, we’d like to keep you up to date on the introduction of the new categories. Sign up for updates and we will contact you by email when new information becomes available.

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