I
just installed the oldest filter I have ever used. This is a Honeywell Fram XG3597A that may be from 2006. The box lists 2005 as the copyright date, and the date code is C60593. IIUC that date code represents the 59th day of 2006 or 2016, and I can't imagine they would still be using 10+ y.o. boxes in 2016. After all, Honeywell sold their FRAM shares in 2011 (according to AI).
Therefore I believe this filter is 19 years old, and I found it on the walmart clearance shelf a few years ago, still wrapped in cellophane; apparently someone found it in a back room! Or someone returned it gor a refund after all these years.
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