I am curious and wary of additives for cars, but this one looks promising...Water Wetter... It is supposed to improve water's heat transfer capabilities by making water more "slippery".

In fact, I've read by googling water wetter that it is being used even by computer fanatics to cool, of all things, their pentiums!!
A lot of positive reviews from the racing set.
Intriguing to learn that 50/50 glycol/water mix is not really the best cooling mixture after all!

Water na wetter pa! Please read up on it and post your opinions please. Thanks!

http://www.redlineoil.com/redlineoil/wwti.htm

BTW nakabili ako sa Q.C. ung dealer ni hindi nag aadvertise ng produkto nila.