Castrol Manual GL-4 80W-90 may be used in applications where API GL-4 performance is required
Good thermal stability protects against deposit formation and oil thickening maintaining the life and performance of lubricant and transmission.
Good antiwear and load carrying characteristics extend the life of components.
Improved low temperature protection and gear shifts compared to monograde products.
Physico-chemical properties
| Name | Method | Units | Manual GL-4 80W-90 |
| Density @ 15C, Relative | ISO 12185 | g/ml | 0.89 |
| Viscosity, Kinematic 100C | ASTM D445 | mm²/s | 13.9 |
| Viscosity, Kinematic 40C | ASTM D445 | mm²/s | 142 |
| Viscosity Index | ASTM D2270 | None | 101 |
| Pour Point | ASTM D97 | °C | -30 |
| Viscosity, Brookfield @ -26C (80W) | ASTM D2983 | mPa.s (cP) | 120000 |
| Flash Point, COC | ISO 2592 | °C | 234 |