Quote:
Originally Posted by Bill Z
Use only green ethylene glycol (IAT - Inorganic Additive Technology) antifreeze in your Model A, such as Zerex original green. The use of most modern (OAT - Organic Additive Technology) “extended life” antifreeze will attack copper, brass and solder present in older cooling systems. There are many articles out there warning of this.
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Zerex was yellow, Prestone was green.
Bill