2001 Mercury Cougar Owner Guide 2nd Printing - Page 220

Maintenance and care Coolant usage in severe winter climate If you drive in extremely cold climates less than -34°F (-36°C), it may be necessary to increase the coolant concentration above 50 %. Refer to the chart on the coolant container to ensure the coolant concentration in your vehicle will provide adequate freeze protection. Never increase the engine coolant concentration above 60 % (protection to -60°F). At a level over 60 %, your engine could overheat and become damaged. Coolant usage in hot climate If you drive in hot climates, it is still necessary to maintain the coolant concentration at 50/50 coolant and water. Do not allow the concentration to fall below 40 % coolant. At a concentration less than 40 %, the corrosion protection to your engine and cooling components may be compromised and permanent damage may result. Use of recycled engine coolant Ford Motor Company does not recommend the use of recycled engine coolant in vehicles originally equipped with orange Extended Life coolant since a recycling process that produces orange coolant is not yet available.