Two weeks I replaced the coolant on my car. What was in the car at the time was green, and what I had delivered was orange.

So I drained the coolant from the rad, flushed with water and run that engine until it was running completely clear.

I then refilled with the orange coolant.

But now...its turned green!!! Does this normally happen with G-05 coolant? I highly doubt that its mixed with stuff in the engine as its the header tank thats green. When I mix in fresh coolant thats orange, the cooler changes...then goes green again after a run.

Standard G-05 behaviour or not?