37 items found. For further information on glossary terms contact us

Carbon Residue Chemicals

Coked material remaining after an oil has been subjected to high temperatures.

Carcinogen Chemicals

A cancer-causing substance. Certain petroleum products are classified as potential carcinogens under OSHA criteria. Suppliers are required to identify such products as potential carcinogens on package labels and Material Safety Data Sheets.

Cavitation Properties

The formation of an air or vapour pocket (or bubble) due to lowering of pressure in a liquid, often as a result of a solid body, such as a piston, moving through the liquid; also, the pitting or wearing away of a solid surface as a result of the collapse

CCS Test Methods

Cold Crank Simulator

CEC Industry Associations

Coordinating European Council. An Industry-based organisation which develops test methods for the performance testing of Automotive Engine Oil, Fuels & Transmission Fluids.

Centipoise (cP) Parameters

Unit of measure for apparent viscosity.

Centistoke (cSt) Parameters

Unit of measure for Kinematic Viscosity.

Cetane Index Parameters

A value calculated from the physical properties of a diesel fuel to predict its Cetane Number.

Cetane Number Parameters

Measure of ignition quality of a diesel fuel. The higher the Cetane Number, the easier a high-speed, direct injection engine will start, and the less white smoking and diesel knock after start up.

Cetane Number Improver Chemicals

An additive that boosts the Cetane Number of a fuel while improving combustion efficiency and increasing power in a diesel engine.

Chemical Stability Properties

The tendency of a substance or mixture to resist chemical change.

Cleveland Open Cup (C.O.C.) Parameters

An apparatus used to determine the flash and fire points of petroleum products other than fuel oils and those having an open cup flash below 79C/175F.

Closed Cup (covered sample container) Parameters

D93 "Flash Point by Pensky-Martens Closed Test" for fuel oils — also for cutback asphalts and other viscous materials and suspensions of solids

Cloud Point Parameters

The temperature at which a cloud of wax crystals appears when a lubricant or distillate fuel is cooled under standard conditions. Indicates the tendency of the material to plug filters or small orifices under cold weather conditions.

CMA Industry Associations

Chemical Manufacturers Association

Coefficient of Friction Parameters

Number obtained by dividing the frictional force resisting motion between two bodies (F) by the normal force pressing the bodies together (L). m = F L

Cohesion Properties

That property of a substance that causes it to resist being pulled apart by mechanical means.

Cold Cranking Simulator (C.C.S.) developed in a cold engine. Test Methods

An intermediate shear rate viscometer that predicts the ability of an oil to permit a satisfactory cranking speed to be developed in a cold engine.

Combustion Chamber Engine Parts

The space between the piston and cylinder head in an internal combustion engine where the charge of fuel plus air is burned to produce power.

Compatibility Properties

A lubricants ability to be mixed with another lubricant without detriment to either lubricant. Also, the ability to come into contact with other components or materials without detrimental effects.

Compound Chemicals

Substance formed by the combination of two or more elements with differing physical and chemical properties than the combining elements.

Compounded Oil Products

A blend of petroleum oil with small amounts of fatty or synthetic fatty oils is referred to as compounding. Compounded oils are used for certain wet applications to prevent washing-off of the lubricant from the metal surfaces. The fatty materials enable t

Compression Ignition Engine Performance

Ignition of fuel by the heat generated in compressing the air charge, as in the diesel engine.

Compression Ratio Engine Performance

The ratio of the volume of combustion space at the bottom dead centre to that at top dead centre, in an internal combustion engine.

Consistency Properties

The degree to which a semi-solid material such as grease resists deformation.

Contaminant Chemicals

Any material that is unwanted or adversely affects the fluid power system and/or its components.

Coolant Chemicals

Fluid used to remove heat. Commonly found in an engines cooling system.

Copper Strip Corrosion Parameters

Qualitative measure of the tendency of a liquid to corrode pure copper.

Corrosion Processes

Destruction of a metal by chemical or electro-chemical reaction with its environment.

Corrosion Inhibitor Chemicals

A lubricant additive for protecting surfaces against chemical attack from contaminants in the lubricant. The most common types of corrosion inhibitors generally react chemically with the metal surfaces to be protected, thus forming an inert film in these

cP Parameters


Cracking Processes

Refining process in which large molecules are broken down into smaller molecules. Cracking takes place to some extent whenever high molecular material is heated strongly, but can be increased by catalysts.

Crankcase Engine Parts

The housing in which the crankshaft and many other parts of the engine operate. On a two-cycle engine, the area in which the fuel/oil mixture is drawn before being transferred to the cylinder.

Crankcase Dilution Engine Performance

When unburned fuel finds its way past the piston rings into the crankcase oil, where it dilutes or thins out the engine lubricating oil.

Crude Oil Chemicals

Naturally occurring petroleum, before any refining or treatment.

cSt Parameters


Cylinder oil Products

A lubricant for independently lubricated cylinders, such as those of steam engines and air compressors; also for lubrication of valves and other elements in the cylinder area. Steam cylinder oils are available in a range of grades with high viscosity’s to

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