When I road-raced motorcycles and did on-track instructor duties at a racing school, our sanctioning body would only allow plain water, or palin water treated with Water Wetter. Nothing else.
That stuff works great, and doesn't make a slick mess on the track when you crash/blow a hose/blow a motor or all three!!!
I used it in my '02 Lightning's intercooler AND engine cooling system. I had it chipped and pulley-ed to more than 500HP and never had a cooling problem. And that thing ran HOT!
Eric