Evan's Coolant isn't cheap but it's a waterless system as well as zero pressure/low pressure system. Your overall coolant system isn't as stressed. Boiling point is a good 100 degrees higher then what you can get. Freezing point is -70 degrees F. Over all very good stuff.
It has many benefits, and I like to know that instead of changing out my coolant frequently "I'm picky that way every 6 months or 2 track days". I can just change it out once per year. Remember DO NOT MIX ANY WATER WITH EVANS.
Evans Cooling Systems, Inc. High Performance Engine Cooling and Power Production. <---link for coolant. Again this is not for everyone but I just take a little bit extra care of my toys.