Long as I can remember I used regular Prestone antifreeze, always mixed with distilled water in my older non antifreeze specific vehicles. Bought two gallons of the new Prestone Every Car antifreeze, but I am re thinking that I may take them back and get some other brand that is the 'Green' formulation.
Did some looking around and found this recommendation from Champion Radiators
What Coolant Color Should I Use In A Champion Radiator?