Section 422 (Engine Cooling - 3.0L Power Stroke Diesel): Specifications: Antifreeze

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Percent Antifreeze/Coolant to Distilled Water	Freeze Protection
42/58	-14.8°F (-26°C)
58/42 (Extreme Cold Climates)	-57.9°F (-50°C)