Don't overbuy on filters. Let Wal-Mart be your storage cabinet.
...or....
Store all newly bought filters submersed completely in a dino-frankenbrew bath of fresh oil from oil bottle leftovers and keep them there until just four minutes before usage. Store said special-use Coleman cooler in the corner of a dry basement, wrapped inside a black garbage bag drawn tight, where sun, small farm animals, insects, wives and others cannot possibly taint these precious oil filtration devices.
Clearly these are the only options. /s