LUBRICANT COMPOSITION Russian patent published in 2021 - IPC C10M107/34 C10M129/74 C10M169/04 C10N30/02 C10N40/02 C10N40/04 

FIELD: production of lubricants for cars.

SUBSTANCE: present invention relates to a lubricant composition that contains a polyalkyleneglycol base oil component in an amount of at least 60 PBW (parts by weight) based on 100 PBW of the specified lubricant composition. The specified lubricant composition has a kinematic viscosity from 4 to 50 cSt at 100 °C and a kinematic viscosity from 20 to 700 cSt at 40 °C, each measured in accordance with ASTM D445. The specified polyalkyleneglycol base oil component comprises a first polyalkyleneglycol having a kinematic viscosity from 2 to 70 cSt at 100 °C and a kinematic viscosity from 5 to 200 cSt at 40 °C, each measured in accordance with ASTM D445, and the second polyalkyleneglycol having a kinematic viscosity from 50 to 220 cSt at 100 °C and a kinematic viscosity from 150 to 1300 cSt at 40 °C, each measured in accordance with ASTM D445. The specified second polyalkyleneglycol has a kinematic viscosity that is greater than the kinematic viscosity of the specified first polyalkyleneglycol at 100 °C and 40 °C; it is used as a lubricant for the axle. The invention also claims a method for contacting the lubricant composition with the vehicle axle.

EFFECT: increasing the fuel use efficiency of the vehicle.

11 cl, 7 dwg, 2 tbl