[Anthony]

I think Evan's coolant is basically propylene glycol (prestone low tox), similar to ethylene glycol, which both have a boiling point of about 385 degrees. Therefore, it really never turns into the gaseous phase , and never develops high pressures, like water based coolants. Also, because of no water, there is much reduced corrosion. However, glycols have about 50% the rate of heat transfer, and heat capacity, and because of this, the engine needs to run at a higher temperature to transfer / remove the same amount of heat.

Maybe not the best for a high performance engine ? Maybe better for a regular classic car, driver ? Water based coolant is more effective for removing engine heat.