Well the thing is that this coolent runs without any water and lasts just about forever.The system does not have to be pressurized so that head gaskets and hoses would last longer.Read what it says please and then tell me if you have used it or know anyone who has.As far as running plain water in nascar,who cares? I just want to know if this stuff works or not.Think about it this way,idleing along the trail on a 90 F day and trying to keep your engine cool,as opposed to 100+ mph on a track,big difference and with a boiling point of 375 F without being pressurized and with no water.The facts fellas,the facts. <img src="/forums/images/graemlins/smile.gif" alt="" />