An oil is any substance that is in a viscous liquid state at ambient temperatures or slightly warmer, and is both hydrophobic and lipophilic.
Oil Canning
A dished distortion in a flat or nearly flat surface.
Oil Consumption
The amount of lubricating oil an engine uses.
Oil Control Ring
Piston ring that prevents an excessive amount of lubricating oil from being drawn up into the combustion space during the suction stroke.
Oil Detergent
Designed to chemically neutralize acidic contaminants in the oil before they become insoluble and fall out of the oil, forming a sludge.
Oil Groove
A channel or channels in a bearing to improve oil flow through the bearing.
Oil Hardening
A process of hardening a ferrous alloy of suitable composition by heating within or above the transformation range and quenching in oil.
Oil Mist
A means of lubricating by injecting oil into an air stream producing a finely atomized spray.
Oil Mist Lubrication
A method of lubricant delivery in which oil is piped throughout the machine to desired locations and dispensed with a spray nozzle.
Oil of Bitter Almond
Old name for Benzaldehyde.
Oil of Mirbane
Old name for Nitrobenzene.
Oil of Vitriol
Alternative name for Sulphuric Acid.
Oil Seal
Device used to prevent oil leakage past a certain area.
Oil Splash System
Engine lubrication system where the end of the connecting rod dips into the oil in the sump and splashes it around the crankcase.
Oil Whirl/Whip
An unstable free vibration whereby a fluid-film bearing has insufficient unit loading.
Moulded abrasives in various shapes used to hand-sharpen cutting tools.