MANILA, Philippines - Be vigilant against engine overheating by having the preferred coolant this summer season. Change your habit of using tap water alone for your radiator and replace it with Prestone Coolant. Water is an important part of the coolant mix. However, water contains impurities that would affect the operation of cooling system that forms scale deposits, sludge causing corrosion. The right mix, according to experts, is 50-percent Prestone Coolant Concentrate plus another 50-percent distilled water for vital heat transfer that delivers optimum operating temperature, rust and corrosion protection. Engine overheat is oftentimes the reason that vehicles stall during long drives during the Holy Week. For a safe and hassle-free drive, always use Prestone Coolant for year round protection from overheating, rust and corrosion. Prestone Coolant Concentrate and Prestone Ready-To-Use are available in auto supplies and hardware stores.