Section 257 (Engine Cooling - 6.7L Power Stroke Diesel): Specifications: Antifreeze

WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. 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 deg.F (-26 deg.C)
58/42 (Extreme Cold Climates)	-57.9 deg.F (-50 deg.C)