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Gear oil of medium-load automobile（GL-4）
Technical specification:
In accordance with requirements of gear oil of medium-load automobile（GL-4）Q/CNPC-FSＨ0910-2001.
Typical performance:
Excellent lubrification, antiwear property, oxidation stability, anti-corrosive property. It is the same as US APIGL－4 grade oil.
Main technical requirements:
| Viscosity grade |
Quality index |
| 80W/90 |
85W/90 |
90 |
| Kinematic viscosity (100°C), mm/s |
13.5-＜24.0 |
13.5-＜24.0 |
13.5-＜24.0 |
| Channel point，°C, ≤ |
-35 |
-20 |
-17.8 |
| Flash point（open ）°C, ≥ |
165 |
165 |
180 |
| Viscosity index, ≥ |
85 |
85 |
85 |
| Temperature when apparent reaches viscosity 150Pa.s, °C, ≤ |
-26 |
-12 |
- |
Its environment temperature of application and the choice of viscosity grade are as the following:
| Viscosity grade |
Quality index |
| 80W/90 |
85W/90 |
90 |
| Environment temperature（℃）,≥ |
-26 |
-12 |
18 |
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