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