Lubricating oil and grease are all one of "lubricants". The so-called lubricant, simply put, is between two relatively moving objects, and has the function of reducing the friction between two objects due to contact.

Lubricating oil is a technology-intensive product that is a mixture of complex hydrocarbons whose true performance is a combination of complex physical or chemical processes. The basic properties of lubricating oils include general physical and chemical properties, special physical and chemical properties and simulated bench tests.

Each type of grease has its common general physical and chemical properties to indicate the inherent quality of the product.

(1) [lubricating oil]: oil used as a lubricant (such as petroleum distillate or fat)

(2) [lubricant]: An oily liquid applied to the surface of a moving part of a machine bearing or a part of the human body. It has the functions of reducing friction, avoiding heat, preventing machine wear and medical use. It is generally a product of fractionated petroleum and is also extracted from animal and vegetable oils. Contains "grease". Generally it is a non-volatile oily lubricant.