API for diesel


The specification of diesel engine oil start with C(abbreviation of Commercial) and second letter means level of upgrade. Now we developed up to ‘CJ’. The number after two alphabet means cycle.

CJ-4 : This is for 4 cycles of high speed diesel engine on market in 2006. This meets exhaust gas regulation established on 2010. It can be used with fuel which have up to 0.05wt% of sulfur. Stronger engine protection than CI-4 – Protection from engine abrasion, Protection of post-cleaning device of exhaust gas, prevention of sediment, prevention of oxidation, stability in low/high temperature, etc

CI-4 : This is for 4 cycles of diesel engine on market in 2002. This meets exhaust gas regulation established on 2004. It can be used with fuel which have up to 0.05wt% of sulfur. EGR is used for diesel engine.

CH-4 : This is for 4 cycles of high speed diesel engine on market in 1998. This meets exhaust gas regulation established on 1998.

CG-4 : This is for 4 cycles of high speed diesel engine on market in 1995. It can be used with fuel which have up to 0.05wt% of sulfur. EGR is used for diesel engine. This meets exhaust gas regulation established on 1994.

CF-4 : This is for diesel engine on market in 1990. This is for engine with natural inhalation of high speed 4 cycles and turbo charger.

CF-2 : This is for diesel engine on market in 1994. This is for 2 cycles of engine in extreme condition.

CF : This is for diesel engine on market in 1994. .This is for indirect injection diesel engine for off-road with using fuel including below 0.05wt% of sulfur.

CE : This is for diesel engine on market in 1985.

CD-II : This is CD level of engine oil for 2 cycles of engine.

CD : This is introduced on 1955, natural inhalation and for turbo charger engine.

CC : This is for diesel engine after 1990.

CB : This is for diesel engine after 1961.

CA : This is for diesel engine after 1959.

Specifications of API gasoline


Specifications of engine oil for API gasoline start with S(abbreviation of Service) and second alphabet means upgrading class. Now SN class is highest class.

SN : Specification of gasoline engine established since 2011. Compared to previous class, it has features of improvement of protecting piston by reducing high temperature of sediment, fortified management of sludge, and improvement of seal protection.

SM : Specification of gasoline engine established since 2004. Meeting regulation of motor makers since 2004. Compared to previous class, it has features of reduction of sediment, better stability of oxidation, improvement of anti-abrasion and improvement of shelf life of lubricants.

SL : Specification of gasoline engine established since 2001. Meeting regulation of motor makers from 2001 to 2004. Compared to previous class, it has features of reducing evaporation loss, reducing high temperature sediment and improving vesicular.

SJ : Specification of gasoline engine established since 1996. Meeting regulation of motor makers from 1998 to 2000. This is engine oil specification for catalyst protection of gasoline motor. Compared to previous class, it has features of reducing evaporation loss, reducing high temperature sediment and improving pumping performance in low temperature.

SH : Specification of gasoline engine established since 1994. Meeting regulation of motor makers from 1994 to 1997. Compared to previous class, it has features of better stability of oxidation in high temperature, preventing sediment and improving prevention of corrosion.

SG : Specification of gasoline engine established since 1989. Meeting regulation of motor makers from 1989 to 1993. This is specification for gasoline engine lie sedan, van, small truck. Compare to previous class, it has features of reduction of sludge, better stability of oxidation, anti-abrasion, prevention of corrosion.

SF : Specification of gasoline engine established since 1980. Meeting regulation of motor makers from 1980 to 1988. Compare to SE class, it has features of better stability of oxidation, anti-abrasion, prevention of corrosion.

SE : Specification of gasoline engine established since 1972. Meeting regulation of motor makers from 1972 to 1979. Compare to previous class, it has features of better stability of oxidation.

SD : Specification of gasoline engine established since 1971. Meeting regulation of motor makers from 1968 to 1971. It has features of prevention of sediment in high temperature and improvement of anti-corrosion.

SC : Specification of gasoline engine established since 1967. Meeting regulation of motor makers from 1964 to 1967.

SB : Specification of gasoline engine established since 1951. It is made by adding anti-oxidation agent and anti-abrasion agent to base oil.

SA : Specification of gasoline engine established since 1930. It is made only with base oil without any additives.