If a 50/50 mix of water and coolant is good, how come 65/35 isn t better?
Remember that antifreeze needs water to work. You should never use a mixture of more than 60% coolant or antifreeze. You see the ability of the coolant mix to carry heat away is reduced by an over concentration of coolant. So your protection against boil over or freezing actually goes down after 60% coolant, 40% water.
