by 6000 SSEi

Water will freeze at 32*F (0*c) and boil at 212*F (100*c). However if you mix Antifreeze (Ethylene Glycol) with it in a 50/50 ratio it changes to -49*F (-45*c) freeze and 233*F (112*c) boiling point.

Remember that 1 Lb pf pressure in the cooling system will increase the boiling point of the coolant by 3 Lbs.