Group II Base Oils
Group II Base Oils are manufactured through advanced hydroprocessing technology with catalytic dewaxing under high hydrogen pressure. Using state-of-the-art catalyst systems, the dewaxing process converts normal straight-chain paraffins into branched isoparaffins, producing high-performance base stocks. Unlike solvent dewaxing, isomerization dewaxing results in superior properties such as:
- High viscosity index
- Excellent oxidation stability
- Low volatility (Noack)
- Outstanding low-temperature performance
Applications
Passenger Car Motor Oils - PCMO (5W, 10W, 15W grades)
Group II base oils are widely used in passenger car motor oils due to their balance of oxidation stability, viscosity index, and low sulfur content. They help formulators achieve API SN/SM and ILSAC GF-5 standards, delivering reliable protection and fuel efficiency.
Heavy-Duty Diesel Engine Oils (HDDO)
For commercial vehicles and heavy-duty engines, Group II base oils provide the required thermal stability and deposit control. They extend oil life, reduce downtime, and meet strict ACEA E7/E9 and API CK-4 standards for modern diesel engines.
Transmission Fluids (MTF, ATF)
Group II base oils are a common choice for manual (MTF) and automatic transmission fluids (ATF), offering excellent shear stability and frictional characteristics. They ensure smooth gear shifting, extended component life, and reduced wear.
Hydraulic Oils
Due to their low sulfur and high oxidation resistance, Group II base oils are suitable for high-pressure hydraulic systems. They provide excellent cleanliness and thermal stability, ensuring consistent performance in mobile and industrial hydraulics.
Turbine & Compressor Oils
Group II base oils are used in gas and steam turbines as well as air compressors where oxidation resistance and low volatility are essential. They help reduce oil consumption and extend equipment life in critical power generation and industrial applications.
Industrial Gear Oils
Group II base oils provide the film strength and load-carrying capacity required for gear systems. Their stability ensures longer oil drain intervals and protection under heavy shock loads, making them suitable for steel mills, mining, and heavy industry.
Why Choose us for Group II Base Oils
Global Network
Our extensive network ensures a reliable and consistent supply of Group II Base Oils, regardless of market volatility.
Competitive Pricing
We offer Group II Base Oils at highly competitive prices. By leveraging long-term relationships with trusted suppliers and a strong position in the market.
Compliance & Quality
Alta Group® works only with certified suppliers and ensure every shipment complies with destination country regulations, quality standards, and food safety requirements.
Key Specifications:
Property Typical Range Notes Kinematic Viscosity @ 100 °C
| 2.3 – 9.1 mm²/s |
| Covers viscosity grades from ~70N to 350N |
Viscosity Index (VI)
| 112 – 116 |
| Higher than Group I, enabling broader blending flexibility |
Flash Point
| 14.0 – 2.3 wt% |
| Low volatility ensures reduced oil consumption |
Noack Volatility
| ≥95% Ø1–6 mm |
Pour Point
| -48 to -12 °C |
| Excellent low-temperature performance |
CCS Viscosity (-30 °C)
| ~2,100 – 6,100 mPa·s |
| Ensures compliance with cold-cranking requirements |
Density @ 15 °C
| 832 – 853 kg/m³ |
| Standard density for Group II range |
Saturates
| >98 wt% |
| Ensures high oxidation stability |
Sulfur Content
| <10 ppm |
| Ultra-low sulfur |
Color (ASTM)
| <0.5 |
| Water-white, clear appearance |