Coolant is a liquid mixture of water and antifreeze that is poured into the cooling system. The thermal overload of the engine in hot weather is prevented due to this fluid; moreover, the coolant does not freeze at critical cold temperatures outside. Typically, antifreeze is sold in concentrated form, which, before being poured into the car’s cooling system, is compounded with water in a proportion of 50/50. Pay attention that this concentration of water and antifreeze can be changed depending on the driving conditions. For example, in the northern regions, where low negative extreme temperatures are observed in winter, the ratio of water to antifreeze can be reduced. The matter can be also poured in concentrated form, but remember that the more you append antifreeze, the more you make the freezing point of the liquid.