001 When to refill coolant?

Generally, most car drivers pay less attention to this matter. On the other hand, they completely forget. But, once they come to realize, the leakage is already there waiting for repair. Inside all new car models nowadays, especially, aluminium radiators (composed of a number of temperature censors) are installed. Therefore, if possible, a yearly change of liquid coolant is recommended. Or else, it should be done every 25,000 kilometres of driving, at least. For those frequently used cars, what should be cared for most is rusty color or ramains derived from liquid in the radiators, for they are the main cause of unusual high temperature. Due to this fact, most automobile manufacturers put warning signs to remind drivers of the time to fill liquid coolant just to prevent rusty (that undoubtedly speeds up the rise of boiling point as high as 100 degrees celcius) and help extend validity of censors and relative equipments for a longer use. By the way, it is quite significant for drivers to read detailed usage at the side of liquid coolant can to ensure the most appropriate mixture and quantity they should fill in the radiators which, of course, entirely different from each other.