37 items found. For further information on glossary terms contact us
Coked material remaining after an oil has been subjected to high temperatures.
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.
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
Cold Crank Simulator
Coordinating European Council. An Industry-based organisation which develops test methods for the performance testing of Automotive Engine Oil, Fuels & Transmission Fluids.
Unit of measure for apparent viscosity.
Unit of measure for Kinematic Viscosity.
A value calculated from the physical properties of a diesel fuel to predict its Cetane Number.
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.
An additive that boosts the Cetane Number of a fuel while improving combustion efficiency and increasing power in a diesel engine.
The tendency of a substance or mixture to resist chemical change.
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.
D93 "Flash Point by Pensky-Martens Closed Test" for fuel oils — also for cutback asphalts and other viscous materials and suspensions of solids
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.
Chemical Manufacturers Association
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
That property of a substance that causes it to resist being pulled apart by mechanical means.
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.
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.
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.
Substance formed by the combination of two or more elements with differing physical and chemical properties than the combining elements.
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
Ignition of fuel by the heat generated in compressing the air charge, as in the diesel engine.
The ratio of the volume of combustion space at the bottom dead centre to that at top dead centre, in an internal combustion engine.
The degree to which a semi-solid material such as grease resists deformation.
Any material that is unwanted or adversely affects the fluid power system and/or its components.
Fluid used to remove heat. Commonly found in an engines cooling system.
Qualitative measure of the tendency of a liquid to corrode pure copper.
Destruction of a metal by chemical or electro-chemical reaction with its environment.
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
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.
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.
When unburned fuel finds its way past the piston rings into the crankcase oil, where it dilutes or thins out the engine lubricating oil.
Naturally occurring petroleum, before any refining or treatment.
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