Is produced by means of refining crude oil. This means that crude oil is heated in order that various distillates can be separated from one another. There are three types of base oils: mineral, vegetable, and synthetic.

SIs produced by means of refining crude oil. This means that crude oil is heated in order that various distillates can be separated from one another. There are three types of base oils: mineral, vegetable, and synthetic.N 150 a light-grade base oil at the lower end of the specifications for Grade I light base oils.
SN 500 a light-grade base oil at the upper end of the specifications for Grade I base oils.