GTX JDC
Member
I am upgrading the radiator in my 67 GTX and I considering using an aftermarket coolant. Has anyone used or is currently using VP Fuel's Stay Frosty Racing formula or their High Performance formula? They claim the Racing formula can lower the cylinder head temperature by "up to 100 degrees" which I am skeptical about. The High Performance formula says "it will lower the operating temp. up to 25 degrees". The High Performance formula contains a percentage of antifreeze making it more suitable for street cars while the Racing formula is more for track use, so no antifreeze. This stuff isn't inexpensive so I curious what someone who has actually used it thinks about it. The engine builder recommended distilled water and Redline Water Wetter which I am currently using but it is not helping with the heating issue.