I'm with Bill on this one, but as he mentioned some of the other Gearheads prefer the Dex-compatible. I know what the "all makes/allmodels" is - the G05 type coolant. I do not know that the orange Dex-compatible is not Dex. So, like Bill, I don't take the chance.

As was also mentioned, if you are under warranty, it likely would be safer for you to use the Dex to be certain there are no issues with claims. Change it out at least every 3 years, and keep it up to the proper level. Dex can become corrosive when mixed with air in the system.

Would it be advantageous to flush out the old Dex, and refill with the "all makes, all models" coolant? I wonder?

I did it, option A, a little over two years ago with no ill effects to my knowledge.

edit - added option A which I inadvertantly left out.

About a month ago I added some of the option A one. My warranty ended ages ago lol.

That'* what I do. I use the Prestone (or similar) flush kit that connects to the heater hose, and flush out the Dex. Then put in the all makes/all models. I do this before problems show up.