What Is PAO8? Properties, Specifications, Applications And Group IV Base Oil Guide Summary This Article Explains What PAO8 (Polyalphaolefin 8 CSt) Is, Its Classification As An API Group IV Synthetic

What Is the Main Difference Between PAO8 and PAO6?

The primary difference is viscosity.

PAO6 has a viscosity of approximately 6 cSt at 100°C, while PAO8 has a viscosity of approximately 8 cSt at 100°C.

This difference affects lubricant film thickness and load-carrying capability.

How Do Their Technical Specifications Compare?

PAO8 generally provides a thicker lubricating film.

Which Performs Better at Low Temperatures?

Both PAO6 and PAO8 offer excellent low-temperature performance.

PAO6 typically demonstrates slightly better fluidity in extremely cold environments due to its lower viscosity.

Which Is Better for Industrial Lubricants?

PAO6 is often used in:

• Hydraulic fluids

• Low-viscosity compressor oils

• Energy-efficient lubricants

PAO8 is commonly used in:

• Industrial gear oils

• Compressor oils

• Synthetic greases

• Heavy-duty lubricant formulations

How Are PAO6 and PAO8 Used in Formulations?

Lubricant formulators often blend different PAO grades to achieve target viscosity and performance requirements.

Typical blends may combine:

• PAO4 + PAO6

• PAO6 + PAO8

• PAO8 + Ester

depending on application requirements.

FAQ

Which Has Higher Viscosity, PAO6 or PAO8?

PAO8 has higher viscosity than PAO6.

Which Is Better for Gear Oils?

PAO8 is generally preferred because it provides a thicker lubricating film.

Can PAO6 and PAO8 Be Blended?

Yes. Blending multiple PAO grades is common in synthetic lubricant formulation.