How Much Coolant?

windchill ,is really used for objects that are creating heat to stay warm //anti freeze is measured in ABSOLUTE temperature// here in UP state NY I have used the recommended 50/50 mix for -32 degree F with no problems with freezing or boiling and if you have a boiling problem "wetting" agents work well and have knocked off 20 degrees on my dads hot rodded flat heads and when in doubt DRAIN IT !!