CA | Launched in 1940, light and intermediate powered ordinary diesel engine oil that prevents corrosion and deposit formation. |
CB | The category published in 1949 for diesel engine requirements working under light and intermediate conditions. Provides a better protection against corrosion and deposit formation than CA category. |
CD | The category with high protection against corrosion and deposit control, published in 1955. Oil developed for ordinary diesel engines with turbo and supercharge that runs on fuel with high sulphide rate. Protective against deposit formation and berth corrosion in high temperatures. |
CC | The category published in 1961 that fulfills the requirements of ordinary diesel engine vehicles with turbo charge and supercharge, running under intermediate and heavy conditions. Prevents corrosion, rust and amortization and performs deposit control. Passed MIL-L-2104 B and 46152 B tests. |
CD-II | Diesel engine oil which fulfills need of two stroke diesel engines and is appropriate for API CD category. Revised in 1985. |
CE | It is the level developed in 1983 for heavy duty diesel engines with turbo charge and supercharge which runs under low speed-heavy load and high speed-heavy load. It provides better protection against oil loss, deposit formation and corrosion than CD level. |
CF | Developed in 1994 for diesel engines with indirect injection, turbo charge and supercharge which runs on high sulphide fuel. It has higher piston deposit control and berth corrosion prevention than CD. |
CF-4 | Applied in 1990, is it the level that provides less deposit formation and oil consumption in addition to CE performance. Oil for heavy duty diesel engines with turbo charge and supercharge that runs under conditions of low speed-heavy load and high speed-heavy load. |
CF-2 | Engine oil launched in 1994 that prevent corrosion of cylinder and piston ring and deposit formation better in two stroke diesel engines in addition to CF performance requirements. |
CG-4 | It is the Heavy Duty Engine Service category published in 1994. Provides better piston deposit control and less carbon accumulation. It is the category that fulfills the needs of high-speed, heavy-duty diesel engines with four stroke, direct injection and turbo charge, used on both highways and lands. |
CH-4 | Diesel engine oil launched on 1 December 1998, fulfilling exhaust emission standards, also used in stroke engines. Developed specially for high-speed, four stroke diesel engines running on fuels that consists of sulphide up to 0.5 %. It also fulfills the standards of CD, CE, CF-4 and CG-4. |
CI-4 | Heavy-duty diesel engine oil launched in 2002. Engine oil that fulfills 2004 exhaust emission standards, used in four stroke high-speed engines. Higher persistence on high and low temperatures, higher piston deposit control, higher soot control, higher corrosion and oil cost controls. |
CJ-4 | Engine oil developed heavy-duty diesel engines, which fulfills 2007 API performance standards and provides outstanding exhaust cleaning system. Features advanced antioxidant and soot control on high temperatures, better pumpability on low temperatures and low oil consumption. It also meets American EPA 2007 standards. |
CK-4 | API Service Category CK-4 describes oils for use in high-speed four-stroke cycle diesel engines designed to meet 2017 model year on-highway and Tier 4 non-road exhaust emission standards as well as for previous model year diesel engines. These oils are formulated 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. API CK-4 oils are designed to provide enhanced protection against oil oxidation, viscosity loss due to shear, 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 exceed the performance criteria of API CJ-4, CI-4 with CI-4 PLUS, CI-4, and CH-4 and can effectively lubricate engines calling for those API Service Categories. When using CK-4 oil with higher than 15 ppm sulfur fuel, consult the engine manufacturer for service interval recommendations.
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FA-4 | API Service Category FA-4 describes certain XW-30 oils specifically formulated for use in select high-speed four-stroke cycle diesel engines designed to meet 2017 model year on-highway greenhouse gas (GHG) emission standards. These oils are formulated for use in on-highway applications with diesel fuel sulfur content up to 15 ppm (0.0015% by weight). Refer to individual engine manufacturer recommendations regarding compatibility with API FA-4 oils. These oils are blended to a high temperature high shear (HTHS) viscosity range of 2.9cP–3.2cP to assist in reducing GHG emissions. These oils are especially effective at sustaining emission control system durability where particulate filters and other advanced aftertreatment systems are used. API FA-4 oils are designed to provide enhanced protection against oil oxidation, viscosity loss due to shear, 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 FA-4 oils are not interchangeable or backward compatible with API CK-4, CJ-4, CI-4 with CI-4 PLUS, CI-4, and CH-4 oils. Refer to engine manufacturer recommendations to determine if API FA-4 oils are suitable for use. API FA-4 oils are not recommended for use with fuels having greater than 15 ppm sulfur. For fuels with sulfur content greater than 15 ppm, refer to engine manufacturer recommendations
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