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Old 11-26-2016, 09:32 AM   #3
36Bill
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Join Date: Jun 2011
Location: Oregon
Posts: 315
Default Re: Any particular antifreeze for a 221 flathead

I use Sierra antifreeze, it is proplyene glycol and is safer for animals.

http://www.peakauto.com/products/ant...motive/sierra/
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