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Base Oil Group – IV
PAO 40cSt

Description:
PAO 40 cSt is a very high-viscosity synthetic base oil from the Group IV (Polyalphaolefin) family, produced by the polymerization of linear alpha-olefins (usually 1-decene). Engineered for exceptional performance, PAO 40 offers outstanding thermal and oxidative stability, excellent shear resistance, and a very high viscosity index, making it the base stock of choice for demanding heavy-duty engine oils, industrial gear oils, greases, and specialty lubricants. Its uniform molecular structure ensures consistent lubrication under extreme mechanical stress and temperature.

Production Process:

  • Oligomerization of Alpha-Olefins: Produces uniform synthetic hydrocarbon molecules with controlled chain length

  • Hydrogenation: Saturates molecules, enhancing chemical stability and purity

  • Precision Fractionation: Ensures tight viscosity control and product consistency

Key Technical Properties (Typical Values):

  • Kinematic Viscosity @ 100°C: ~38–42 cSt

  • Kinematic Viscosity @ 40°C: ~320–350 cSt

  • Viscosity Index (VI): ~140–150

  • Flash Point (COC): >260°C

  • Pour Point: -40°C to -50°C

  • Color: Water-clear

  • Sulfur Content: 0%

  • Saturates: ~100%

  • Volatility (NOACK): Very low

  • Shear Stability: Excellent – maintains viscosity and film strength under heavy load

Benefits:

  • Provides exceptional film strength and lubrication under extreme pressure and temperature

  • Outstanding oxidation resistance extends lubricant life and reduces deposits

  • Excellent cold temperature flow for improved startup performance

  • Ultra-low volatility minimizes oil consumption and emissions

  • Chemically pure and water-clear for consistent, high-quality formulations

  • Enhances performance and durability of heavy-duty lubricants and greases

Applications:

  • Heavy-Duty Engine Oils (HDEO): For large diesel engines and commercial vehicles

  • Industrial Gear Oils: High-load, high-temperature gearboxes requiring superior lubrication

  • Grease Manufacturing: Base oil for heavy-duty and high-temperature grease formulations

  • Compressor and Turbine Oils: Long-life fluids for industrial machinery

  • Marine and Railway Lubricants: Reliable performance under severe conditions

  • Specialty Synthetic Lubricants: Where high viscosity and stability are essential

Packaging Options:

  • Available in bulk, 200-liter drums, IBC totes, or flexitanks

  • Custom blending and additive package options offered

Compliance & Standards:

  • Fully meets API Group IV base oil requirements

  • Suitable for lubricants complying with API SN, SP, ACEA E7/E9, and major OEM approvals

  • Compatible with Group III, Group V, esters, and other synthetic base oils

Product data sheets can be downloaded from the following link(s):

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