Lubricants may be solids, such as plastic beads, glass beads, nut hulls and graphite, or liquids, such as oils, synthetic fluids, glycols, modified vegetable oils, fatty-acid soaps and surfactants. A lubricant provides a protective film which allows for two touching surfaces to be separated, thus lessening the friction between them. The two major categories of lubricant are those that are organic and those that are synthetic. Specialties include: any type of industrial or power train lubricant, fuel, base stock, intermediate, additive, functional chemical, coolant, or process oil. As with other lubricants, its job is to reduce wear and friction between moving objects (like engine parts), enabling longer operation and higher efficiency. This reference summarizes current knowledge about the different materials that are added to lubricants to improve their performance characteristics.
Oil as a lubricant
Oil A general term for a water-insoluble thick liquid that possesses lubricating properties. You may be tempted to use other types of oil you already have around your house or WD-40 or something, but many of those things are flammable and will only serve to damage...
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