An industrial oil is a product that is applied on various surfaces with relative motion in between them. Industrial oil lessens friction and insulates these machinery against wear, corrosion, and oxidation. However, it has other functions as well, namely as a sealing agent, a heat transfer agent, a corrosion preventative agent, or an agent for trapping and eliminating mechanical systems contaminants.

Industrial oils are designed to deal with the tremendous pressures of equipment like industrial gearboxes, reduction gears, concrete mixing machines, circulation systems, and agricultural and marine deck equipment.