Bryan K. Walton

I continue to be confused about coolant colors in today's automobiles.
I have a 2003 Ford Focus Wagon. The owner's manual says:

"Add Motorcraft Premium Gold Engine Coolant
(yellow-colored), VC-7­A (VC-7­B in Oregon), meeting Ford
Specification WSS-M97B51­A1."

"Do not add/mix an orange-colored, extended life coolant such
as Motorcraft Speciality Orange Engine Coolant, VC-2 (US) or
CXC-209 (Canada), meeting Ford specification WSS-M97B44­D
with the factory-filled coolant. Mixing Motorcraft Speciality Orange
Engine Coolant or any orange-colored extended life product with your
factory filled coolant can result in degraded corrosion protection."

Now, I saw some Prestone coolant at Autozone the other day. I believe it
was a 50/50 pre-mixed extended life coolant (in a yellow bottle).
It said "All Makes All Models"
The bottle said it is compatible with ANY antifreeze/coolant,
regardless of color, and can be added to any antifreeze/coolant
in ANY make or model of car or light duty truck on the road today.

So, is this true? Can I really use this to top off when needed?

Thanks!
Bryan

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