Heat transfer fluids corresponding to mixtures of at least one hydrogen bond donor and at least one hydrogen bond acceptor are provided. The heat transfer fluids can have an unexpectedly high heat capacity relative to the expected heat capacity based on the heat capacities of the at least one hydrogen bond donor and the at least one hydrogen bond acceptor. In some aspects, the heat transfer fluids can also have a sufficiently high electrical resistivity to be suitable for use in environments such as heat management systems in electric vehicles.

Heat transfer fluids corresponding to mixtures of at least one hydrogen bond donor and at least one hydrogen bond acceptor are provided. The heat transfer fluids can have an unexpectedly high heat capacity relative to the expected heat capacity based on the heat capacities of the at least one hydrogen bond donor and the at least one hydrogen bond acceptor. In some aspects, the heat transfer fluids can also have a sufficiently high electrical resistivity to be suitable for use in environments such as heat management systems in electric vehicles.

A gear oil composition that has a kinematic viscosity at 40 C. in the range of 68 to 1000 csdt when measured in accordance with ASTM D445 can be made. The gear oil composition is useful as a lubricant in a gear box, especially in a wind turbine gear box.

A gear oil composition that has a kinematic viscosity at 40 C. in the range of 68 to 1000 csdt when measured in accordance with ASTM D445 can be made. The gear oil composition is useful as a lubricant in a gear box, especially in a wind turbine gear box.