API classes for diesel engines
From CA to CI-4 PLUS: a description of every “C” class.
- API CI-4 (CI-4 PLUS) Class A new performance class of engine oils for diesel engines . Compared with API CI-4, the requirements for soot content as well as for volatility and…
- API CH-4 Class The class was introduced on December 1, 1998. Engine oils of this class are used in four-stroke diesel engines operating in high-speed regimes and meeting the…
- API CG-4 Class The class was introduced in 1995. Engine oils of this class are recommended for four-stroke diesel engines in buses, trucks and tractor units of both highway…
- API CF-2 (CF-II) Class Oils intended for use in two-stroke diesel engines operating under heavy conditions.
- API CF-4 Class Engine oils for use in four-stroke diesel engines , starting with 1990 model-year engines.
- API CF Class Engine oils for diesel engines with indirect injection . The classes were introduced between 1990 and 1994. The digit after the hyphen indicates a two-stroke…
- API SE Class: Diesel Engines from 1983 Engine oils for use in diesel engines starting with 1983 model-year engines (obsolete class).
- API CD-II Class Engine oils for use in high-output two-stroke diesel engines ( obsolete class ).
- API CD Class Engine oils for high-output diesel engines used in agricultural equipment ( obsolete class ).
- API CC Class Engine oils for diesel engines operated under medium load (obsolete class) .
- API CB Class Engine oils for diesel engines operating under medium load (obsolete class) .
- API SA Class: Diesel Engines Engine oils for lightly loaded diesel engines ( obsolete class ).