MS-8rk
TU 38.1011181-88
The MS-8rk oil is made from a special deep-refined base with antioxidant, antiwear and anticorrosive additives.
The MS-8rk oil is intended for aircraft engines lubricating and conservation. Equal to the MS-8p oil with regard to the performance criteria, MS-8rk by far exceeds it in point of conservation properties. The aircraft engine oiling systems conservation period is equal to 3 months when using the MK-8 oil, to 1 year in the case of the MS-8p oil, and increases to 4-8 years with the MS-8rk oil.
| Index name | Norm |
|---|---|
| Kinematic viscosity, mm2/с (cSt): | |
| at 50°С, min. | 8,0 |
| at minus 40°С, max. | 5000 |
| Closed flash point, °C, min. | 145 |
| Pour point, °C, max. | -55 |
| Thermal-oxidative stability at 150°C within 50 hours: | |
| a) kinematic viscosity at 50°C after oxidation cSt, max. | 11 |
| b) kinematic viscosity at minus 40°C after oxidation cSt, max. | 6750 |
| c) acid number after oxidation, mg KOH per 1 g of oil, max. | 0,7 |
| d) mass content of residue after oxidation, %, max. | 0,15 |
| e) corrosion on plates after oxidation, mg/cm2, max.: | |
| - SHH-15 steel in accordance with GOST 801-60 | Absent |
| - M1 or M2 copper in accordance with GOST 859-66 | ±0,2 |
| - AK-4 alluminum alloy in accordance with GOST 4784-74 | Absent |
