Does anyone run anything other than traditional 50/50? I've heard that 60/40 (water/coolant) is good for locations that don't get too cold and 70/30 for the summer. I use 100% distilled for my school's race team.. but it's a little two-cylinder.

Getting ready to flush out the 'ol girl - gonna pick up some of the red juice tomorrow.

most tracks from what I have been told require 100 percent water.
dont want a lick of coolant on an apex!