Viscosity index: 80. Kinematic viscosity (at 100 °C): more than 20.5. Application temperature range: from -18 °C to + 260 °C. Application: It is used in piston engines of aircrafts, lubrication systems of turbine engines, axial hinges of transmission bushings, for lubrication of motor compressors of gas pumping units. Performance properties: it is used as a base component for some motor oils and lubricants. Oils of groups A, B2 are intended for use in diesel engines of old models operating on fuels with low sulfur content. The popularity of the oils of these groups remains in most cases due to the tradition and low prices. With rare exceptions, these data can be replaced by more efficient oils of group V2 of the same viscosity type. Mineral aviation motor oil (SAE 50). It belongs to groups A, B2.