Base Oil Group – III

6cSt

Description:
Group III – 6 cSt is a medium-viscosity, synthetic-grade base oil produced through advanced hydrocracking, hydroisomerization, and hydrofinishing of high-quality paraffinic feedstocks. With a viscosity around 6 centistokes at 100°C and a very high viscosity index (typically above 130), this base stock delivers outstanding oxidation stability, thermal resistance, and low volatility — making it ideal for a wide range of premium automotive and industrial lubricants, including those marketed as full synthetic.

Production Process:

• Severe Hydroprocessing: Removes sulfur, aromatics, and other impurities to create a highly saturated, stable structure

• Isomerization & Fractionation: Reshapes molecular structure for superior cold performance and viscosity control

• Hydrofinishing: Enhances long-term oxidation resistance, color, and blend uniformity

Key Technical Properties (Typical Values):

• Kinematic Viscosity @ 100°C: ~5.7–6.3 cSt

• Viscosity Index (VI): ≥ 130

• Flash Point (COC): >230°C

• Pour Point: -21°C to -27°C

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

• Sulfur Content: ≤ 0.03%

• Saturates: ≥ 90%

• Volatility (NOACK): Very low

• Oxidation Stability: Outstanding, suitable for extended drain applications

Benefits:

• Excellent thermal and oxidative stability for high-temperature operation

• Superior film strength and viscosity retention under mechanical stress

• Low volatility helps reduce oil consumption and exhaust emissions

• Outstanding cold-start performance, enabling use in a wide temperature range

• High additive response and blend flexibility for premium formulations

• Water-clear and highly pure, ideal for synthetic and semi-synthetic blends

Applications:

• Passenger Car Motor Oils (PCMO): SAE 5W-30, 5W-40, and 10W-40 synthetic formulations

• Heavy-Duty Diesel Engine Oils (HDEO): Multigrade oils requiring high-temperature performance and oxidation resistance

• Gear and Transmission Oils: Automotive and industrial gearboxes with high load and temperature exposure

• Compressor and Hydraulic Oils: Clean and stable for long-life systems

• Synthetic Blends: Often used in combination with PAOs and esters to meet or exceed OEM and global standards

Packaging Options:

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

• Available with custom blend support and additive integration on request

Compliance & Standards:

• Fully meets API Group III base oil classification

• Suitable for use in lubricants formulated to meet API SN, SP, ILSAC GF-6, ACEA C3/C5, and a variety of OEM performance specifications

• Compatible with PAO, Group III+, Group II, and synthetic esters