I may have. My SRT uses the HOAT coolant.
You can flush it out with water (no additive) and then use Zerex G-05 to replace it. I buy the ready mix 50/50 because it's easier. They recommend using distilled water to keep the minerals from plating out on the cooling system. Most guys flush with tap water first and then follow with distilled just to get out most of the remaining tap water before refilling the system with coolant.