Bright stock base oil, specifically BS 150, is a high-viscosity oil positioned at the upper end of the specifications for Grade I base oils. Produced through atmospheric and vacuum distillation at Group I refineries, brightstock is extracted and dewaxed from residual oils and undergoes hydro finishing.
Viscosity Specifications:
- BS 150 Viscosity: 28.0-33.5 cSt at 100°C
- BS 150 Viscosity: 461-597 cSt at 40°C
Most of Group III and Group II refineries have no possibility to produce such heavy grades as brightstock, only few of them can make base oils with viscosity @ 100C above 20 cSt, which creates a high demand for this product.
Applications of Bright stock Base Oil
- Engine oils
- Transmission fluids
- Gear oils
- Metalworking fluids
- Greases
- Hydraulic oils
- Transformer oils
Packaging Options:
Bright stock base oils can be supplied in various formats, including:
- Flexi-containers
- ISO-tanks
- IBCs in 20-foot containers
- Bulk vessels for export
- Trucks within Europe
- In CIS countries the product is available in rail tank cars
For colder destinations, we recommend ISO-tank delivery with heating, as brightstock becomes too viscous near 0°C.
Product Details:
Origin: EU, Central Asia
Hazard class: BS 150 base oil is classified as not dangerous goods
CAS Number: 64742-54-7
EC Number: 265-157-1
Legion Oil & Gas LLC specializes in the bulk purchase and worldwide distribution of BS 150 bright stock base oils, serving regions such as Europe, USA, Canada, Latin America, Africa, and Asia—including Argentina, Brazil, Colombia, Turkey, Vietnam, and China.
To choose a particular product for your application or find out bright stock base oil price please contact our sales department: info@legionoilandgas.com.
Bright stock base oil specification (ВS-150)
| Parameters | Units | Guaranteed | Typical |
|---|---|---|---|
| Appearance | – | C&B | C&B |
| Color ASTM | – | Max 0,5 | L0,5 |
| Kinematic viscosity at 40 °C | mm2/s | – | 445,5 |
| Kinematic viscosity at 100 °C | mm2/s | 33,5 – 35,5 | 33,8 |
| Viscosity index | – | Min 105 | 111 |
| Pour point | °C | Max -15 | -18 |
| Flash point | °C | Min 250 | 262 |
| Sulfur | wtppm | Max 100 | 3,4 |
| Aromatics | % | – | 0,0 |
FAQ about bright stock Base Oil (BS 150)
Base oil and bright stock are not the same, though they are closely related.
Key Differences:
- Category: Bright stock is a specific type of base oil, whereas base oil is a broader term that includes a range of oils (including bright stock).
- Viscosity: Bright stock is much heavier and more viscous compared to most other base oils.
- Applications: Bright stock is typically used in applications requiring thicker oils, while lighter base oils are used in general-purpose lubricants.
Bright stock is a subset of base oils, but not all base oils are bright stock.