Shell Rotella Exceeds New CK-4 Specifications

Shell Rotella Surpasses CK-4 Standards

The American Petroleum Institute (API), working with engine manufacturers and oil makers, has completed redesigning two new heavy-duty engine oil specifications. Nearly a decade has passed since the last diesel engine oil category, API CJ-4, was developed and major changes are required. The current CJ-4 standard has lasted well beyond the life of the typical engine category. Some of the engine tests required to qualify an oil are no longer…

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