Lubricants

[Sommer]

Substances used to reduce friction between bearing surfaces, or incorporated into other materials used as processing aids in the manufacture of other products, or used as carriers of other materials. Petroleum lubricants may be produced either from distillates or residues. Lubricants include all grades of lubricating oils, from spindle oil to cylinder oil to those used in greases.

[Mark Zuckerberg]

a liquid such as oil that is used to make the parts of an engine move easily together, or a substance put on any surface to help it move more easily against another one