All liquid lubricants are classified into viscosity grades (SAE classification for motor and transmission oils, ISO VG classification for industrial oils) and for groups of performance levels (API, ACEA classification for engine and transmission oils, ISO classification for industrial oils.
According to the aggregate state they are divided into:
Engine oils – used in internal combustion engines.
Transmission and gear oils – used in various gears and gear boxes.
Hydraulic oils – used as a working fluid in hydraulic systems.
Food oils and liquids – used in equipment for food and packaging, where the risk of contamination of products with a lubricant.
Industrial oils (textile, for rolling mills, hardening, electrical insulating, heat carriers and many others) – used in a wide variety of machines and mechanisms for lubrication, preservation, compaction, cooling, removal of waste processing, etc