desoto1939 Posted August 10, 2022 Report Posted August 10, 2022 I contacted the Zerex Antifreeze technical service department regarding the proper Antifreeze that we should be using in our old cast iron engines. The rep informed me that we should be only using the Zerex Green Original Antifreeze for our cars that uses the IAT technology. We should not use the OAT type in our cars. Please read the attached information sheets to help you understand what product to use in your cars. Rich Hartung Desoto1939@aol.comAntifreeze in classic cars.pdf Zerex Original Green Antifreeze .pdf Anti-Freeze and flushing cooling system.pdf 3 Quote
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