This is exactly why I was asking the queston, so I could get some enlightenment on the matter. Certainly it's easier to keep going with the OEM coolant, I just figured it can't hurt to ask and learn something in the process whether it ends up being a good idea or not.
JFP, thanks for the in-depth explanation. Your point #6 is exactly why I was asking, in search of any and all solutions to the hot running. I've seen it all over this board and others how hot these cars run just by their nature, excluding things like blocked up radiators and bad pumps that are problems outside of normal operation. So at least I know I'm on the right track by doing things like the 3rd radiator, lo-temp thermostat, etc., to try and cool the car off.
Thanks everybody for the info.
