API Engine Service Classification

C ‘COMMERCIAL’ CLASSIFICATION (FOR HEAVY‐DUTY DIESEL ENGINES)
DESCRIPTION RELATED SPECIFICATIONS & TESTS
CJ-4 Introduced in 2006 for high-speed 4-stroke cycle diesel engines designed to meet U.S. 2007 model year on-highway exhaust emission standards as well as for previous model years. These oils are especially effective at sustaining emission control system durability where particulate filters and other advanced after-treatment systems are used.
CI-4 PLUS Introduced in 2004 for the latest generation of North American 4-stroke heavy-duty diesel engines. May be used in place of CD, CE, CF-4, CG-4, CH-4 and CI-4 oils. Cummins CES 20078, Mack EO-N Premium Plus 03
CI-4 Introduced in 2002 for 4-stroke heavy-duty diesel engines meeting 2004 exhaust standards implemented in 2002 and to provide improvements in engine durability where Exhaust Gas Recirculation (EGR) is used. May be used in place of CD, CE, CF-4, CG-4 and CH-4 oils. Cummins CES 20078, Mack EO-N Premium Plus
CH-4 For 4-stroke diesel engines designed to meet 1998 emission standards. May be used in place of CD, CE, CF-4 and CG-4 oils. Cummins M11, Mack EO-M, EO-M Plus, Caterpillar IP
CG-4* Introduced in 1994 for 4-stroke heavy-duty diesel engines meeting 1994 U.S. exhaust emission standards. Can be used in engines requiring CD, CE and CF-4 oils. Caterpillar 1N, Mack EO-L
CF-4* For 4-stroke heavy-duty diesel engines manufactured since 1990. CF-4 oils may be used in place of CE, CD or CC oils. CF-4 oils provide improved control of oil consumption and piston deposits. Caterpillar 1K
CF-2* Introduced in 1994 for 2-stroke diesel engines requiring improved control of cylinder and ring-face scuffing and deposits. May also be used in place of CD-II oils. CF-2 oils do not necessarily meet the requirements of CF or CF-4 unless passing test requirements for these categories. Caterpillar 1M-PC, Detroit Diesel 6V-92TA
CF* Introduced in 1994 for indirect injected diesel engines. CF oils can be used when CD is recommended. Caterpillar 1M-PC
CE* For 4-stroke heavy-duty diesel engines manufactured since 1983. MIL-L-2104D/E, MIL-L-45199, Mack: EO-K/2, Cummins: NTC 400
CD-II* For severe duty 2-troke diesel engines. CD-II oils meet all the performance requirements of CD. MIL-L-2104D, Detroit Diesel: 6V-53T
CD* For severe naturally aspirated, turbocharged or supercharged diesel engines. Introduced in 1955. MIL-L-2104C/D, MIL-L-45199
CC* For moderate duty diesel and heavy-duty petrol engines. Introduced in 1961. MIL-L-2104B
CB* - MIL-L-2104A Supp. 1
CA* - MIL-L-2104A

* Obsolete category.

S ‘SERVICE’ CLASSIFICATION (PRIMARILY FOR PETROL ENGINES)
DESCRIPTION RELATED SPECIFICATIONS & TESTS
SN Introduced in 2010 along with the Resource Conserving classification and ILSAC GF-5.
SM Introduced in 2004 to provide improvements in oxidation resistance, deposit control, anti-wear and low temperature performance. ILSAC GF-4
SL Introduced in 2001 to provide improvements in high-temperature deposit control and oil consumption. ILSAC GF-3
SJ Introduced in 1997 (First available 15 October 1996) to provide improvements in oil volatility, filterability, gelation, deposits and catalyst compatibility. ILSAC GF-2, MIL-L-46152E
SH Introduced in 1994 to provide improvements in deposit control, oil oxidation, wear, rust and corrosion. ILSAC GF-1
SG* Introduced in 1989 to provide improvements in engine deposits, oil oxidation, and engine wear. Also provides protection against rust and corrosion. Ford: ESE-M2C-153E, GM: 6048M, MIL-L-46152D
SF* Introduced in 1980 to provide improvements in oxidation stability and anti-wear performance. Also provides protection against engine deposits, rust and corrosion. Ford: ESE-M2C-153B/C/D, GM 6048M, Chrysler MS 6395, MIL-L-46152B/C
SE* Introduced in 1972 to provide improvements in oil oxidation, high-temperature engine deposits, rust and corrosion. Ford: ESE-M2C-101C, GM 6136M, MIL-L-46152A
SD* Introduced in 1968. -
SC* Introduced in 1964. -
SB* For minimum duty petrol engines. Inhibited oil (non-detergent).
SA* For utility petrol and diesel engines. Straight mineral oil.

* Obsolete category.