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API Service Category CJ-4
These oils are especially effective at sustaining emission control system durability where particulate filters and other advanced aftertreatment systems are used. Optimum protection is provided for control of catalyst poisoning, particulate filter blocking, engine wear, piston deposits, low- and high-temperature stability, soot handling properties, oxidative thickening, foaming, and viscosity loss due to shear.
Engine oils that meet the API Service Category CJ-4 designation have been tested in accordance with the ACC Code and may use the API Base
Oil Interchangeability Guidelines and the API Guidelines for SAE Viscosity-Grade Engine Testing.
API CJ-4 oils exceed the performance criteria of API CI-4 with CI-4 PLUS, CI-4, CH-4, CG-4 and CF-4 and can effectively lubricate engines calling for those API Service Categories. When using
The first license date for API CJ-4 will be October 15, 2006.
Effective May 1, 2006, marketers may license products meeting API CJ-4 requirements as API CI-4 with CI-4 PLUS, CI-4, CH-4, CG-4, and