Lubrication Terminology

Lubricant Terminology — Terms and Definitions

Parafinincs Good stability, used most commonly in hydraulic and production oils.
Napthenics Oxidizes easily, most commonly used in cutting or soluble oils.
Aromatics Used mostly in the manufacturing of plastics and rubber.
Viscosity The thickness of the oil at a certain temperature.
Viscosity / Temperature As temperature rises viscosity goes down.
Viscosity Index The number to use relating to how well the lubricant will withstand high and low temperature extremes.
Oxidation Inhibitor Reduces oil breakdown due to excessive heat.
Anti Wear Agents Reduce the metaltometal contact, can withstand heavier loads.
Extreme Pressure Agents Stronger than antiwear, for the heaviest of loads.
Rust Inhibitor Prevent corrosion usually found in the EP oils and some others.
Adhesive Agents Helps retain film strength uniformly on the metal surfaces.
Friction Modifier General category of materials that apply to natural or synthetic fatty additives: They have two primary purposes:
1.) To increase the lubricity or slipperiness where friction coefficient may be needed.
2.) To improve fuel economy or for energy conservation.
Defoamant Used to reduce bubbles in oils or for the rapid breakup of foam.
Viscosity Improvers Added to oils that require a maintained viscosity at extremely high temperature ranges.
Pour Point Depressants Added to oils that require the lowest temperatures to maintain fluidity or pourability and reduces wax buildup at these low temperatures.
Flash or Flame Depressants Added to oils that are usually in mist or fog type oil bath lubrication systems or in fire resistant fluids. For example: For safety concerns near welding operations.
Dispersants Suspends organic deterioration products to minimize them as harmful deposits and carries them to the filters.
Detergents Added to clean carbon deposits and reduce acid levels in high sulfur fuels.
DeEmulsifiers Added to oil where exposed to water to separate the water and added to help inhibit rust.
Drop Point Additives These can raise the operating temperature of the grease where the thickeners will not separate from the oils. They also can control how easily the greases can be pumped through lines, systems and components. The higher the drop point, the higher the operating temperature.
Water Repulsion Additives These are added to prevent the washing away of the lubricants in areas where water is present or exposed to in the systems or components.
Superior Petroleum
865 N Superior Dr. Crown Point, IN 46307
Phone: 800.700.OILS (5457)