Concentrated engine coolant is useful in both petrol and diesel engines . It is a coolant for aluminium or cast iron engines. This coolant can be mixed using 33% concentration with purified water to give frost protection to minus 18 Degree Centigrade. It is also recommended to use a 50% dilution to provide optimum corrosion protection and freeze protection down to minus 36 Degree centigrade. This coolant gives year round protection to engines.