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Coolant, i.e. antifreeze, plays an important role in the vehicle, as it protects the engine not only from overheating but also from freezing. That's why, before the temperatures drop below zero, you should remember a few golden rules of experienced drivers and masters. First, check if there is enough antifreeze in the system, which you will see when you look in the container in the engine compartment. The level must be in the middle because it should not be too much or too little. Here's what you need to know about antifreeze.