Hello Van. I just spent a day on the Big track at WillowSprings. I had a blast until a radiator hose busted at a union between rubber and plastic while in a turn which caused my car to spin out and nearly missing the wall. Scary indeed but it revealed a weakness in my car. I just purchased one of your super competition heat exchangers from another member on the forum so that my temps could stay lower during spirited driving. As I am researching it's installation I've come up to a lot of suggestions on which coolant to use. Honestly it is overwhelming. Steve from True forged recommend I use the Motorcraft orange as per your suggestion. Just wondering why it is a good choice. My car is an 2007 GT 500. Motor is stock and only has a tune and intake. Thanks in advance and have a great day.