It will probably become outdated long before it goes bad in the bottle. If it's good for 5 years and 100,000 miles in a cooling system it must be good forever in the original sealed container. 

Dennis

-----Original Message-----
From: Arkady Mirvis [mailto:arkadymirvis@gmail.com] 
Sent: Friday, May 07, 2010 5:50 PM
To: Dennis Haynes; vanagon@GERRY.VANAGON.COM
Subject: Antifreeze shelf life

Has anyone asked anyone a question: "What is that antifreeze shelf life?" 
Like the original blue color or pink color VW Autobahn antifreeze
Ark