In addition to the aforementioned basic constituents, almost all lubricating oils contain corrosion and oxidation inhibitors. It also neutralizes acids that originate from fuel and from oxidation of the lubricant (detergents), improves the sealing of piston rings, and cools the engine by carrying heat away from moving parts. The main function of motor oil is to reduce friction and wear on moving parts and to clean the engine from sludge (one of the functions of dispersants) and varnish (detergents).
They typically consist of base oils enhanced with various additives, particularly antiwear additives, detergents, dispersants, and, for multi-grade oils, viscosity index improvers. Motor oil, engine oil, or engine lubricant is any one of various substances used for the lubrication of internal combustion engines. Pouring fresh motor oil into an engine Different brands of bottled motor oil at a store Not to be confused with fuel oils used as motor fuel.
