LUBRICANTS KNOWLEDGE

American Petroleum Institute
Gasoline Engine Oil Service Classifications
- Category
- Status
- Characteristic & Application
- SA
- Obsolete
- No additives, engines before 1930
- SB
- Obsolete
- Rust & Oxidation additives, engines before 1951
- SC
- Obsolete
- Protect Deposit and Wear, engines before 1967
- SD
- Obsolete
- Corrosion protection, engines before 1971
- SE
- Obsolete
- Better Oxidation & Deposit, engines before 1979
- SF
- Obsolete
- Better Anti-wear, engines before 1988
- SG
- Obsolete
- Better Deposit/Wear protection, engines before 1993
- SH
- Obsolete
- Control sludge formation, engines before 1996
- SJ
- Current
- Fuel economy, less evaporation, engines before 2001
- SL
- Current
- Better Deposit/Foam & Oil Loss, engines before 2004
- SM
- Current
- Control Oxidation/Deposit/Wear, engines before 2010
- SN
- Current
- Deposit & sludge control, engines after 2010
- SN RC
- Current
- Fuel economy, emission control, engines after 2010
- SN Plus
- Current
- LSPI (Low Speed Pre-Ignition) after 2010
 
Diesel Engine Oil Service Classifications
- Category
- Status
- Characteristic & Application
- CA
- Obsolete
- Light duty, engines built before 1959
- CB
- Obsolete
- Moderate duty, engines built before 1961
- CC
- Obsolete
- Moderate to severe duty, engines built (1990)
- CD
- Obsolete
- Severe duty, engines built before 1994
- CE
- Obsolete
- Turbocharged heavy duty, engines (1994)
- CF-4
- Obsolete
- Severe duty, low emission, engines (2009)
- CG-4
- Obsolete
- Severe duty, Sulfur 0.5%, engines (2009)
- CH-4
- Current
- 1998, High speed, Low Emission, Sulfur 0.5%
- CI-4
- Current
- 2002, High speed, EGR, Sulfur 0.5%
- CJ-4
- Current
- 2010, Low SAPS, Sulfur 0.0015%
- CK-4
- Current
- 2017, Protect oil oxidation, Sulfur 0.0015%
 
Gear Oil Service Classifications
- Category
- Status
- Characteristic & Application
- GL-1
- Obsolete
- Manual transmission, R & O additives
- GL-2
- Obsolete
- Worm gear axles with anti-wear additives
- GL-3
- Obsolete
- Manual transmission & spiral bevel axles under moderate condition
- GL-4
- Current
- Axles with spiral bevel and hypoid gears under moderate speeds and loads
- GL-5
- Current
- Hypoid gears in axles under high-speed/shock load, low-speed/high-torque conditions
- GL-6
- Obsolete
- Gears designed with a very high pinion offset
