What type of lubricants are there?

Lubricants can be classified according to their state:

• Liquid: lubricating oils which represent the majority,
• semi-solid: would be greases,
• solid such as graphite,
• and even gas.

Another classification can be made according to its nature, referring to the base oil it contains. We distinguish between synthetic, semi-synthetic, and mineral oils.
When the base oil is obtained through the conventional refining of petroleum, it is considered mineral. When it is obtained through more complex processes (chemical synthesis or other), the lubricant is considered synthetic. A semi-synthetic lubricant would be the combination of mineral and synthetic base oils.