I have been using EVANS NPG+ waterless coolant in my car since new with excellent results. I also use this in a number of my race cars with small and big block Chevrolet power, as well as in my Toyota Tundra and Sienna as well as my dirt bikes.
It is great in almost any temperature (-10 to 120+) with no modifications.
Best of all, the system does not have any internal pressure (no blown hoses or gaskets) eliminates hot spots in the motor, and will never boil over. It is a little pricey at $25 a gallon, but never needs replacing. This stuff is awesome!! Check out their website at
or call them at 1-888-990-2665