How To Select A Synthetic Base Oil for Lithium Grease Formulation

Selecting the right synthetic base oil is one of the most important decisions in lithium grease formulation. Factors such as viscosity, oxidation stability, volatility, and operating temperature requirements directly affect grease performance.

What Base Oils Are Used in Lithium Grease?

Common options include:

• Mineral Oils

• PAO Synthetic Base Oils

• Ester Base Oils

Why Is PAO Widely Used?

PAO offers:

• High viscosity index

• Excellent oxidation stability

• Low volatility

• Broad operating temperature range

Which PAO Grades Are Commonly Used?

Typical viscosity grades include:

• PAO 2

• PAO 4

• PAO 6

• PAO 8

• PAO 40

Selection depends on bearing speed, load, and operating temperature.

FAQ

Which PAO Grade Is Best for Lithium Grease?

There is no universal answer; the optimal grade depends on application requirements.

Can Different PAO Grades Be Blended?

Yes. Blending is common in grease formulation.