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Molybdenum-based oil additive. Examples of this class of oil additive typically contain the inorganic compound molybdenum disulphide (MoS2). Molybdenum disulphide is a solid, not a liquid, and is an example of a solid lubricant. It contains sheets of sulphur atoms that are weakly bonded and slide easily over one another. Molybdenum-based oil additives are used to reduce friction in engines and other moving parts in machines, increasing fuel economy and efficiency.
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