Measuring your antifreeze/coolant’s resistance to cold, and advice on how to best prepare your cooling system for winter weather The word ‘antifreeze’ is one of the most straightforward terms in the automotive lexicon. Simply put, your automobile’s engine runs hot, and it requires a cooling system to keep it at its optimum operating temperature, regardless of whether you’re driving in the dead of winter or during the dog days of summer. At its most basic, this is accomplished by running coolant through channels in the engine block with its flow regulated by a thermostat and a pump, and its temperature...