Group III 4 cSt base oil is widely used in the formulation of high-quality engine oils. It is produced through hydro-skimming of unconverted oil under high pressure, resulting in a product with a high viscosity index, excellent low-temperature flow properties, ultra-low sulfur content, minimal aromatic hydrocarbons, and low volatility.

These base oils undergo the most advanced mineral oil refining processes among all base oil groups. While not chemically synthesized, they exhibit exceptional molecular uniformity, stability, and performance. These attributes lead to Group III 4 cSt base oils being widely used as a base for synthetic or semi-synthetic lubricants, with viscosity of approximately 3.9-4.5 cSt at 100°C.

Advantages:
• Low Pour Point: Ensures excellent pumpability and quick engine starts even in freezing temperatures, making it suitable for diverse climates.
• Thermal Oxidation Stability: Minimizes oil oxidation and scale deposits during high-temperature engine operation.
• Low Volatility: Reduces the oil consumption, decreasing the need for frequent top-ups.
• Extended Oil Life: Offers service life 1.5 to 2 times longer than conventional mineral oils under harsh conditions.
• Compatibility: Easily blends with mineral oils and synthetic ethers, facilitating versatile lubricant formulations.

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