FIELD: manufacturing technology.
SUBSTANCE: present invention relates to base oil composition containing base oil of Group III and polyalphaolefin lubricant, wherein as base oil of Group III oil with kinematic viscosity of 4.0-5.0 mm2/s at 100°C is used, produced by three stage process including hydrocracking, hydroisomerization and subsequent hydro treatment of vacuum gas oil or its fractions, and oil with kinematic viscosity of 19-40 mm2/s at 100°C is represented as polyalphaolefin oil, obtained through oligomerization of alpha-olefins C8, or mixture of C8 and C10, with following ratio of components, wt%: polyalphaolefin oil is 13-27%, base oil of Group III is up to 100%.
EFFECT: technical result of this invention consists in creation of composition of base oil with viscosity index at least of 139, kinematic viscosity at 100°C of approximately 6 mm2/s, wherein for domestic raw components with viscosity index maximum of 133 are used for creation of composition.
1 cl, 1 tbl
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