API - Diesel Engine Classification: CC : For diesel engines with normal service description (lightly supercharged) and gasoline engines. CC oils are very detergent and dispersant and offer good protection against wear and corrosion.

CD : For diesel engines under heavy use, high speed and subject to high effective mean pressure due to a turbocharger. CD oils are very detergent and dispersant and offer good protection against wear and corrosion.

CDII : For two-cycle diesel engines conceived for extreme service. Strict limitation of deposits and wear. CDII oils meet requirements for the CD class above and also satisfy standard two-cycle GM engine tests carried out on a Detroit 6V53T.

CE : For turbocharged diesel engines under heavy use dating from 1983. Aimed at high-powered, high-speed engines and also at slow motors which develop high power. CE oils can replace CD oils in all engines. With the properties of CD oils, these oils are more effective in limiting oil consumption, deposits, wear and oil thickening.

CF : Same as CE with the addition of a test for micro-oxidation. Reinforced protection of pistons and piston rings.

CG : For diesel engines under heavy use. They fight deposits on pistons, wear, corrosion, foaming, oxidation and the accumulation of soot at high temperature. These oils respond to the needs of engines adapted to 1994 emissions standards.

CH : For diesel engines adapted to 1998 emissions standards. These oils are meant to guarantee engine life under the most severe conditions. They allow for more time between oil changes.