Please see link for the confusion. Several are called premium gold there is a yellow version, orange and one with "bittering agent" etc. I am confused on which is correct for my 07 gt500 and I don't want to get it wrong and mix them.
http://www.fordparts.com/Products/Chemicals-EngineProducts-Coolants.aspx
http://www.fordparts.com/Products/Chemicals-EngineProducts-Coolants.aspx