Synthetic highly stable on the basis of difficult aethers and synthetic fat acids S5-S9. It is efficient in the range of temperatures from-60 to +225 °С. It is recommended to application in the heat-stressed aviation technics, and also as the unified oil for working off of new heat-stressed aviation gas-turbine engines (TRD, TVD, TVVD, shaft-turbine engines and reducers of helicopters). Oil possesses the improved vjazkostno-temperature properties and high thermooxidizing stability. It is recommended for perspective aircraft technicians, and also instead of commodity oil and synthetic aviaoils. On the physical and chemical and operational properties most (in comparison with other oils) corresponds to American specification MIL-L-23699F.