Antifreeze does raise the boiling point, but water is unmatched at absorbing and carrying heat away. It may boil over, but then all that's boiling over is water and you can just add more to get home for far cheaper and less environmental impact than boiling out your antifreeze. I wasn't telling him to run his VX on it, he just wanted something to help get him home with.
OK, now we're on the same page
I H8d Thermodynamics in college. I do remember about the caloric capacity of H2O. Thinking about Steam Tables still gives me a headache.