14. Fill the degas bottle to the MAX FILL line.
15. Recommended coolant concentration is 48/52 to 50/50 engine coolant to distilled water (freeze protection -34°C to -37?C [-30°F to -34°F]).
16. For extremely cold climates (less than -37°C [-34°F]):
It may be necessary to increase the coolant concentration above 50%.
NEVER increase the coolant concentration above 60%.
Maximum coolant concentration is 60/40 for cold weather areas.
A coolant concentration of 60% provides freeze protection down to -50°C (-58°F)
Engine coolant concentrations above 60% will decrease the overheat protection characteristics of the engine coolant and may damage the engine.
17. For extremely hot climates:
It is still necessary to maintain the coolant concentration above 40%.
NEVER decrease the coolant concentration below 40%.
Minimum coolant concentration is 40/60 for warm weather areas.
Engine coolant concentrations below 40% will decrease the freeze and corrosion protection characteristics of the engine coolant and may damage the engine.
18. Vehicles driven year-round in non-extreme climates should use a 48/52 to 50/50 (freeze protection -34°C to -37°C [-30°F to -34°F]) mixture of engine coolant and distilled water for optimum cooling system and engine protection.
Original technical text and illustrations, formatted as HTML. Follow the engine, transmission, equipment, model and year specified in the source. Import and layout checks do not establish applicability to every 2015–2017 Mustang. About this collection.