Low viscosity gear oil compositions for electric and hybrid vehicles

A cooling fluid for use in an electric or hybrid vehicle, said cooling fluid having a composition comprising:

• one or more lubricating oil base stocks present at an amount from 50 to 95 weight percent, based on the total weight of the lubricating oil, as a major component;
• and one or more lubricating oil additives present at an amount from 1 to 15 weight percent, based on the total weight of the lubricating oil, as a minor component;
• wherein the one or more lubricating oil base stocks comprise a blend that includes one or more Group IV base oils;
• wherein the one or more lubricating oil additives comprise an antioxidant;
• and wherein the cooling fluid formulation is adjusted to have a kinematic viscosity (KV100) from 1 cSt to 1.5 cSt at 100° C. as determined by ASTM D-445, an electrical conductivity at room temperature of less than 15,000 pS/m as determined by ASTM D-2624, and a coefficient of traction (CoT) of less than 0.0350 as measured using a mini traction machine (MTM) at 80° C. and 1.25 GPa load at 100% slide to roll ratio (SRR).