| Designation | Application |
|---|
| For petrol engines |
| SC | For ice delivered for production in 1964-1967 |
| SD | For ice 1968-1971 |
| SE | For 1972-1979 engines |
| SF | For 1980-1988 engines |
| SG | For boosted engines introduced from 1989-1994 |
| SH | For forced motors introduced in 1994-1996 |
| SJ | For engines post-1996 |
| SL | Newly introduced top quality class for gasoline engines |
| diesel |
| CC | For medium-duty motors produced since 1961 |
| CD | For heavy duty diesel engines, including turbocharged |
| CE | For high-stressed diesel engines operating in severe conditions (since 1983) |
| CF-4 | Engines released since 1998 |
| CF-2 | Improved CD-II performance for two-stroke engines |
| CG-4 | ice release 1994. Improved CF-4 performance and stricter exhaust toxicity requirements |
