Mixture Ratio
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| Freeze protection to | Coolant additive | Water |
|---|---|---|
| -13° F (-25 °C) | approximately 40 % | approximately 60 % |
| -31° F (-35 °C) | approximately 50 % | approximately 50 % |
| -40 °F (-40 °C) | approximately 60 % | approximately 40 % |
NOTE:
Coolant additive prevents freeze and corrosion damage, scaling, and raises the boiling point. For these reasons the cooling system must have coolant additive the whole year.
Especially in countries with tropical climates or when vehicle is driven under heavy load, the coolant improves the engine reliability by its increased boiling point.
The coolant concentration must not be reduced by adding water, even during the warmer season. The coolant additive ratio must be at least 40%.