Group III Base Stocks
We are dedicated to providing a range of advanced base oils to help you formulate your products more effectively. Our ALTUM™ base stocks exhibit low volatility and low-temperature fluidity.
ALTUM™ 4 & ALTUM™ 6
We’re introducing our new Group III base stocks to the North American market to help meet the industry’s need for reliable, consistent supply. Our ALTUM™ 4 & ALTUM™ 6 base stocks are part of our Group III base stock slate for formulation and qualification of a wide range of finished lubricants.
-
Uses of ALTUM™
- Automatic Transmission Fluids
- Automotive Gear Oil
- Gasoline Engine Oil
- Heavy/Light Duty Diesel Oils
- Hydraulic Fluids
-
Benefits of ALTUM™
- Strong low-temperature performance and oxidative stability enable robust performance of finished lubricants across various applications.
- As part of the ALTUM™ Base Stocks Slate, ALTUM™ products are designed for interchangeability for formulation and qualification of a wide range of finished lubricants.
ALTUM™ Stock Specifications
| Property / Method | ALTUM™ 4* | ALTUM™ 6* |
|---|---|---|
| Appearance (Visual) | Clear and Bright | Clear and Bright |
| ASTM Color (ASTM D1500) Max | L0.5 | L0.5 |
| CCS viscosity -35ºC (ASTM D5293) Max, mPa·s | 3000 | 10000 |
| Flash Point, COC (ASTM D92) Min, °C | 200 | 210 |
| Kinematic viscosity @ 100ºC (ASTM D445) Min–Max, mm²/s | 4.1–4.4 | 5.9–6.3 |
| NOACK Volatility (ASTM D5800 Method B) Max, wt% | 15 | 7.5 |
| Pour Point (ASTM D97) Max, °C | -18 | -18 |
| Viscosity Index (ASTM D2270) Min | 120 | 122 |
*ALTUM™ 4 and ALTUM™ 6 will be available in North America in 2028.
-
Health & Safety
Detailed health and safety information for this product is provided in the safety data sheet (SDS), available upon request through your local sales representative or search our safety data sheets.
Safety Data Sheets -
Breaking Ground on Baytown Group III Base Stock Project
Construction begins on a world-class facility to deliver critical Group III base stocks—reinforcing ExxonMobil’s leadership as a supplier of all API base stock groups.
Read More
