Synthetic lubricants are lubricants produced by chemical synthesis rather than by extraction or refinement of petroleum in order to produce a compound that has planned and predictable properties. Within the auto industry synthetic lubricants are typically used as motor oils in gasoline or diesel engines, however other applications of synthetic lubricants include use as food grade and high temperature lubricants, as well as for gear, bearing, air compressor, blower and vacuum pump lubrication.Synthetic lubricants can offer numerous advantages over petroleum-based lubricants, commonly referred to as organic lubricants, including increased shear stability, reduced flammability, high oxidation resistance, decreased loss due to evaporation and enhanced mechanical and chemical properties. However, synthetic lubricants also have some disadvantages when compared to organic lubricants, such as potential problems with decomposition in industrial applications as well as compatibility issues with certain materials. Synthetic lubricants are most widely used in the automotive industry, in addition to use in the aerospace, marine, medical, industrial, HVAC, commercial and textile. Some dry lubricants, such as boron nitride and tungsten sulfide are synthetic, and synthetic lubricating grease is often used in the food industry as food grade lubricant for meat slicing machines and such. Food grade lubricants are particularly important synthetic lubricants, since they must be effective as lubricants as well as safe to digest incase they come in contact with food. Without synthetic lubes, it would be expensive and difficult to keep food processing machines well maintained.