i have seen were it was said the g-05 can be used in the 3.2 s/c engine. color isnt the issue. the additives and the anticorrosion protection is what you need to look for. for the price it seems about the same as the oem coolant. a key detail is to fully flush the old water out and use a mix with only distilled water. i dont know what the z-05 is mixed with the minerals have been eliminated in distilled water. aluminum heads aluminum block dont use reg tap water