go get the stuff from the part store that mixes with both and call it a day! but better question is where did the coolant go?

 

Thought the green was good.

I've heard both on the switching thing, that as long as a good flush was done it was all good and i've heard that the systems just don't like the opposite formulation. And as said before combining them is a big no no as it turns to gunk. also promotes corrosion last I heard as well.