Low viscosity lubricant with special anti-oxidation additives. Due to its high specific heat and heat conductivity coefficients, high heat transfer rates are possible. It is suitable for heat transfer systems operating between 10°C and 320°C. It is to be used in closed-circulated heat transfer systems in industrial applications, such as in the process industry, chemical plants, textile productions, etc. It can, also, be used for steel quenching processes.