Originally Posted by jwko
Here is a snipet of a article:
Initial laboratory results indicate G 05 is compatible with traditional green product, but mixing with too much green may lower the coolant life. Mixing G 05 with Dex-Cool is probably not wise.
I would say either top it off with the gold or green.
I wouldn't mix it, if in a pinch I would, but the gold has the same life as red coolant, so mixing with green will shorten the life of it, and affect the chemical package for anti-corrosion. Don't use the Prestone any color stuff either. Put in whatever's in there already. Gold-put gold in. Red/Orange-put Red/Orange in. Green-put green in. Make sure you do a 50/50 mixture with water. Get an empty coolant bottle and fill it half way with coolant, the other half with water.