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Lubrication is the process, or technique employed to reduce wear of one or both surfaces in close proximity, and moving relative to each other, by interposing a substance called Lubricants between the surfaces to carry or to help carry the load between the opposing surfaces.
For synthetic liquid hydrocarbons, see Synthetic fuel. Synthetic oil is a lubricant consisting of chemical compounds that are artificially made. Synthetic lubricants can be manufactured using chemically modified petroleum components rather than whole crude oil, but can also be synthesized from other raw materials.