Can I mix Ford orange and ZerexG-05?

[rzoltek]

I still have the original orange coolant in my 2017 convertible.
It just turned 40K miles, this is just a sunny day joyride car.
Checking the level, cold, I'm slightly under "MIN".
I have some ZerexG-05 that I used in my daughter's car.
Can I mix Ford orange and ZerexG-05?

Ford superseded orange for yellow around 2020. Now orange is obsolete.
I read that dex-cool is compatible with Ford orange. I could buy that.
I read that Motorcraft yellow is compatible with the old Ford orange. I could buy that.
But if the ZerexG-05 that I have on hand is compatible I would prefer to use it, rather than have another 75% full product sitting around. I just want to top it off until I do a complete flush and fill with yellow.

Is it ok to mix my existing orange coolant with ZerexG-05?

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[ORRadtech]

If you're planning on doing a flush/replacement with yellow then why not just buy the yellow now? To me that would be preferable to hoping there was ne adverse chemical reaction.
Alternatively you could just add water. The coolant is a 50/50 mix anyway and a little more water won't change the mix that much. Especially if there's a r&r coming.

 

[Crew4991]

OP I would NOT mix the coolants. Either change it out entirely or honestly, just leave it for now.

 

[offroadkarter]

run down to the grocery store and grab a gallon of distilled water and top up with that instead, I wouldn't be mixing orange and G05

 

[JB60]

Ford tech doing mobile recall on my 2023 told me slightly under min is ok.

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