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Performance Specification Frequently Asked Questions
  API Service Category CJ-4 describes oils for use in high-speed four-stroke cycle diesel engines designed to meet 2007 model year on-highway exhaust emission standards as well as for previous model years.
These oils are compounded for use in all applications with diesel fuels ranging in sulfur content up to 500 ppm (0.05% by weight). However, the use of these oils with greater than 15 ppm (0.0015% by weight) sulfur fuel may impact exhaust aftertreatment system durability and/or oil drain interval.

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
CJ-4 oil with higher than 15 ppm sulfur fuel, consult the engine manufacturer for service interval.

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

International Truck and Engine website Caterpillar Website General Motors website

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Phone 202.682.8516 | Email eolcs@api.org
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