DICTIONARY OF AUTOMOTIVE TERMS - "Cg"

CG

Acronym for Center of gravity. Weight center or balance point of an object, such as a truck body. It is calculated to help determine the optimum placement of the truck body on its chassis.

CG-4

API CG-4 category

An API classification for Diesel engine oil for use in high speed four-stroke-cycle diesel engines used in both heavy-duty on-highway(0.05% wt sulfur fuel) and off-highway (less than 0.5% wt sulfur fuel) applications. Introduced in 1994, CG-4 oils provide effective control over high temperature piston deposits, wear, corrosion, foaming, oxidation stability, and soot accumulation. These oils are specially effective in engines designed to meet 1994 exhaust emission standards and may also be used in engines requiring API Service Categories CD, CE, and CF-4. Replaced by CI-4.

CG-90

A product composed of magnesium chloride with an anticorrosive additive that is used as an alternative to road salt