photos and story by mike heyse "courtshark"
When the temperatures allow it, racers run nearly 100% water, typically with a bottle of Redline's Water Wetter added. In any event, coolant has the properties of a surfactant, which means it has both water soluble and insoluble components, and can allow water and oil to mix. Coolant also doesn’t evaporate, so it absorbs into pavement and won’t go away until it gets properly washed off. Until that happens, it is extremely slippery, and thus bad for race tracks.