Greases are manufactured by combining three essential components: base oil, thickener and additives.
Base oils are the liquid portion of any grease and may be mineral, synthetic, or any fluid that contains lubricating properties.
Thickeners may be any material that, in combination with the base oil, produces the solid to semi-fluid structure.
As in lubricating oil additives, grease additives and modifiers impart special properties or modify existing ones.