South Star Chrysler

CJ-4 Diesel Oil  

 The new API CJ-4 oils are made for high-performance diesel engines designed to meet 2007 diesel emission standards. API CJ-4 oils exceed previous performance requirements and are specifically designed to protect emission control systems, help comply with emission standards, reduce engine wear, and control piston deposits and oil consumption. 

While compatibility with Diesel Particulate Filters is the primary reason API CJ-4 was developed, overall oil performance was also enhanced in several key areas that will benefit new and current diesel engines. Improvements were also made to provide increased soot-related viscosity control, increased control of piston deposits and oil consumption, to help protect against engine wear, piston deposits, soot, high temperatures, oil foaming and aeration, viscosity loss due to shear and minimize blocking of the Diesel Particulate Filter.  API CJ-4 oils are also engineered for use in previous model year engines.

Why was the new API CJ-4 oil performance category developed?
New emission standards for heavy-duty engines will be phased in between 2007 and 2010. Engines meeting these new standards will be equipped with advanced emission control technologies, including diesel particulate filters and in most cases exhaust gas recirculation (EGR). The new API CJ-4 performance category was developed to address both the unique needs of these new engines and to protect older engines while enhancing the life of the emission control system as required for regulatory compliance.

Does Chrysler recommend use of API CJ-4 oils to protect 2007 emission-controlled engines?
Yes, API CJ-4 oils, used in engines running on ultra-low sulfur diesel (ULSD) fuel, are critical for the durability and performance of 2007 and newer engines that utilize advanced emission control technologies. These oils have been subject to the most severe qualification testing requirements of any API engine lubricant category.

How does the performance of API CJ-4 oils differ from previous categories like API CI-4 or API CI-4 PLUS?
API CJ-4 oils have additive systems specially designed to improve the protection of both the engine power system and advanced emissions control systems like DPFs. Use of these new oils will help maintain the life of the emission control system as required for regulatory compliance. API CJ-4 oils are formulated for improved wear protection, deposit and oil consumption control, soot-related viscosity control, prevention of viscosity loss from shearing, used oil low-temperature pumpability, and protection from thermal and oxidative breakdown when compared to previous API performance categories.

Do API CJ-4 oils protect older engines as well as API CI-4 or API CI-4 PLUS oils?
Yes, API CJ-4 oils are designed for use in new engines as well as the existing on-highway fleets.