Year manufacturer's recommendations for a change, but you can consider, as appropriate use according to their own situation and condition, ran a year long for a change, then you can at least two years for a change, but you also referred to the proposed replacement of antifreeze coolant ~~~ , automotive engine cooling ensure the normal operation conditions, rust and scale will restrict the flow of antifreeze in the cooling system, reducing cooling effect, causing the engine to overheat, and even cause engine damage. Antifreeze oxide will form acidic substances, corrosive water tank metal parts, resulting in damaged tanks, leakage. The main way to solve the water tank failure during routine inspection on weekdays, the tank should always look for leaks or corrosion phenomenon, to be on time to clean, replace or add antifreeze to increase the boiling point and prolong life. In general, with twenty thousand kilometers or one year to replace the antifreeze. This will serve to improve the boiling point and prevent scale, corrosion and enhance the cooling effect, the pump produces lubrication to avoid the elimination of air bubbles caused by the high temperatures caused by momentary engine damage. Contact edge Manager Tel: 15552352798 0530-5577255 QQ: 1336564526