Cpu coolers h2c

You dont want to use car radiator fluid in a CPU cooler. It was designed for an entirely different style of heat source, one that is supposed to get hotter than the boiling point of water and sometimes starts below the freezing point, while a liquid cooling system in a computer is not expected to deal with anything over 100C. It will probably likely create a buildup inside the cooling system or corrode stuff so its not a good idea to include antifreeze in your liquid cooling system.