Lubricant oil
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A lubricant is a substance introduced to reduce friction between moving surfaces like vehicle and machinery. It may also have the function of cooling, rust prevention, cleaning, sealing, buffering, etc. Typically lubricants contain 90% base oil and less than 10% additives. Mineral oils, bio oils and synthetic oils such as hydrogenated polyolefins, esters, silicones, fluorocarbons and many others are sometimes used as base oils. Additives include viscosity index improver, pour point depressant, antioxidant, dispersant, friction reducer, oilness agent, extreme pressure agent, antifoaming agent, metalde activator,emulgator,anticorrosive,antirust agent, deemulsifier andante oxidation and corrosion agent.