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T Scott · 10-29-2019, 07:35 PM

Regarding shelf life, I'm not sure about the anti corrosion properties but I recently drained the antifreeze out of a boat engine that was winterized 20 years ago. It was clean, still bright green and tested at -50F.

10-29-2019, 07:35 PM	#20
T Scott Senior Member Join Date: Aug 2010 Location: East Boothbay, Maine Posts: 279	Re: antifreeze? Regarding shelf life, I'm not sure about the anti corrosion properties but I recently drained the antifreeze out of a boat engine that was winterized 20 years ago. It was clean, still bright green and tested at -50F.