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Motor oil, engine oil, or engine lubricant is any one of various substances used for the lubrication of internal combustion engines. 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, a common lubricant. A lubricant (sometimes shortened to lube) is a substance that helps to reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move. It may also have the function of transmitting forces, transporting foreign particles, or heating or cooling the surfaces.
A sample of synthetic motor oil. Synthetic oil is a lubricant consisting of chemical compounds that are artificially modified or synthesised. Synthetic lubricants can be manufactured using chemically modified petroleum components rather than whole crude oil, but can also be synthesized from other raw materials.
Factors such as the lubricant consistency, the diameter and length of the feed line and the operating temperature are taken into account. [7] The lubricant, be it oil or grease, is dispensed from a reservoir. The systems can be monitored remotely and managed by control systems. [8] The scientific study of factors such as these is called ...
Boundary lubrication is defined as the regime in which the load is carried by the surface asperities (high points) rather than by the lubricant. [7] This is the effect that makes Ultra-high-molecular-weight polyethylene "self-lubricating". Boundary film lubrication: [8] The hydrodynamic effects are negligible. The bodies come into closer ...
Because GAGs are highly polar molecules and attract water; the body uses them as lubricants or shock absorbers. Mucopolysaccharidoses are a group of metabolic disorders in which abnormal accumulations of glycosaminoglycans occur due to enzyme deficiencies.
Petroleum jelly is commonly used as a personal lubricant, because it does not dry out like water-based lubricants, and has a distinctive "feel", different from that of K-Y and related methylcellulose products. However, it is not recommended for use with latex condoms during sexual activity, as it increases the chance of rupture. [30]
Synthetic oleamide has a variety of industrial uses, including as a lubricant. [15] Oleamide was found to be leaching out of polypropylene plastics in laboratory experiments, affecting experimental results. [16] Since polypropylene is used in a wide number of food containers such as those for yogurt, the problem is being studied. [17]