Hi, my first post on this extremely valuable board! I just acquired a 06 Coupe with 88,400 miles on it. The prior owner is my son in law and his family has had it since about 18K miles. To my son in law's memory, the coolant has never been changed. I see that the current coolant is green in color (not glow in the dark green, just a darkish green) and seems pretty clean looking. Does anyone know what the original, from-the-factory coolant was colored? I plan to change it out to Zerex G-05 soon, but I'm curious if this coolant has been running around this old guy for 16 years. Was the original orange like Zerex? Thanks in advance for your feedback!