Group III 4cSt
Group III 4cSt Base Oil is a premium hydrocracked base stock designed for advanced lubricant formulations, offering high viscosity index, low volatility, and excellent thermal stability for both automotive and industrial applications.

Group III
Group III 4cSt
Group III 4cSt Base Oil is a high-quality hydrocracked base stock widely used in the production of modern lubricants. With a naturally high viscosity index, low volatility, and excellent oxidative stability, it delivers superior performance in demanding automotive and industrial applications. Its clean composition ensures compliance with stringent emission regulations, while its thermal stability and durability make it a preferred choice for formulating engine oils, gear oils, and hydraulic fluids that require long-lasting protection and efficiency.
Packaging Size
1L
4L
5L
20L
25L
208L
Descriptions
Group III 4cSt Base Oil is refined through advanced hydrocracking technology to deliver exceptional purity and consistency. Its excellent oxidation resistance, strong film strength, and high viscosity index make it an essential component in the formulation of high-performance automotive and industrial lubricants. Designed to withstand extreme operating conditions, it supports cleaner emissions, improved fuel efficiency, and long-term equipment protection.
Typical Properties
TEST | METHOD | 4cSt | 6cSt | 8cSt |
---|---|---|---|---|
Kinematic Viscosity @ 212°F /100°C, cSt | ASTM D-445 | 4.0-4.5 | 5.6-6.2 | 7.6-8.2 |
Kinematic Viscosity @ 104°F /40°C, cS | ASTM D-445 | report | report | report |
Viscosity Index | ASTM D-2270 | min120 | min120 | min120 |
SP. Gravity @15°C/ 60°F, g/cm 3 | ASTM D-4052 | report | report | report |
Flash Point, °C | ASTM D-92 | min200 | min220 | min240 |
Pour Point, °C | ASTM D-97 | max(-)12 | max(-)12 | max(-)12 |
Color | ASTM D-1500 | maxL0.5 | maxL0.5 | maxL0.5 |
Water, ppm | ASTM D-6304 | <60 | <60 | <60 |
Acid Number, mgKOH/gm | ASTM D-664 | <0.05 | <0.05 | <0.05 |
NOACK VOLATILITY, wt.% | ASTM D5800 | <18 | <8 | <7 |
COLD CRANKING VISCOSITY, mPa.s | ASTM D5293 | <3500at(-)35℃ | <4000at(-)30℃ | <4500at(-)25℃ |