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Base Oil Group – III
8cSt

Description:
Group III – 8 cSt is a high-viscosity synthetic-grade base oil, produced through severe hydrocracking, hydroisomerization, and hydrofinishing of premium paraffinic crude. With a kinematic viscosity of approximately 8 centistokes at 100°C and a very high viscosity index (typically ≥ 130), this base stock provides excellent thermal stability, oxidation resistance, and film strength. It is ideally suited for heavy-duty engine oils, gear oils, and industrial lubricants where durability and performance under extreme load and temperature are required.

Production Process:

  • Severe Hydrocracking & Isomerization: Yields a highly saturated, stable molecular structure

  • Hydrofinishing: Enhances oxidation resistance, improves clarity, and ensures consistent blend quality

  • Precision Fractionation: Delivers tight viscosity control and consistent performance across batches

Key Technical Properties (Typical Values):

  • Kinematic Viscosity @ 100°C: ~7.8–8.5 cSt

  • Viscosity Index (VI): ≥ 130

  • Flash Point (COC): >240°C

  • Pour Point: -18°C to -24°C

  • Color (ASTM D1500): L0.5 (water-clear)

  • Sulfur Content: ≤ 0.03%

  • Saturates: ≥ 90%

  • Volatility (NOACK): Low – supports stable performance under heat

  • Oxidation Stability: Excellent – suitable for long-drain and high-temperature service

Benefits:

  • Superior film strength and viscosity retention under high load and temperature

  • Low volatility reduces oil consumption and supports emissions control

  • Excellent oxidative and thermal stability for extended drain intervals

  • Strong additive response and compatibility with synthetic and semi-synthetic systems

  • High purity ensures clean burning and deposit control

  • Water-clear appearance for consistent, high-quality formulations

Applications:

  • Heavy-Duty Engine Oils (HDEO): SAE 15W-40, 10W-40, 20W-50 formulations for diesel and commercial vehicles

  • Gear & Transmission Oils: Automotive and industrial gear systems exposed to high stress and temperatures

  • Compressor and Turbine Oils: Systems requiring long-term performance and thermal stability

  • Grease Manufacturing: As a thick base for heavy-duty and high-temperature greases

  • Marine & Railway Lubricants: Where robust base stocks are essential for extended operational reliability

Packaging Options:

  • Available in bulk, 200-liter drums, IBCs (totes), or flexitanks

  • Custom additive blends and private-label packaging available on request

Compliance & Standards:

  • Fully compliant with API Group III base oil specifications

  • Suitable for formulations designed to meet API SN, SP, ACEA E7/E9, and various OEM standards

  • Compatible with Group II, Group III+, PAO, and ester base stocks

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

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