A lubricant is generally an oily fluidic material with the primary function of reducing friction between surfaces in contact.
Lubricant minimizes energy loss generated from friction; at the same time it can also be very useful to clean, cool, and prevent metal parts from corrosion & rust and many such challenges a machine faces during its operation..
In general, a lubricant is composed of two substances: Base Oils & Additives. Base oil can be divided into four groups, usually depending on the purity level of that oil. The Group-I and Group-II are Mineral Base Oils, Group-III is known as Synthetic Base Oil, other base oils fall under Group-IV category. The additive percentage mostly ranges between 10-30% of the lubricant’s composition.