A Base Oil Composition and Use Thereof in the Manufacture of a Fluid for an Electric Vehilcle

A fluid composition for an electric vehicle, wherein the fluid composition is consisting essentially of a base oil 95-99 wt %, and a functional additive 1-5 wt %;

• wherein the functional additive comprises an antioxidant, detergent dispersant, ash-free extreme pressure agent, antifoaming agent, and extreme pressure anti-wear agent, or combination thereof, and wherein the base oil is a base oil composition, comprising the following components in percentage by mass:
• a first poly-α-olefin of 50-90%;
• a second poly-α-olefin of 1-20%;
• and
• a third poly-α-olefin of 5-25%;
• wherein, the first poly-α-olefin and the second poly-α-olefin are metallocene poly-α-olefins, and the third poly-α-olefin is a non-metallocene poly-α-olefin, and the first poly-α-olefin has a viscosity index of 110-150 and a kinematic viscosity at 100° C. of 3-10 mm2/s, the second poly-α-olefin has a viscosity index of 200-300 and a kinematic viscosity at 100° C. of 100-1000 mm2/s, and the third poly-α-olefin has a viscosity index of 60-120 and a kinematic viscosity at 100° C. of 1-8 mm2/s;
• wherein, the metallocene poly-α-olefins are products obtained from polymerization reaction of C4-C20 linear α-olefins in a metallocene catalyst system;
• the non-metallocene poly-α-olefins are products obtained from polymerization reaction of C4-C20 linear α-olefins in a non-metallocene catalyst system.