Originally Posted By: DGXR
RockAuto was doing a closeout on the M1 EP filters and I bought a bunch. Turns out they were all 10 years old, hence the clearance sale. I cut one open and everything inside looked great, nitrile and glue were still soft and pliable, filter element wasn't dry or crusty or flaky. Maybe due to good storage conditions, maybe due to quality filter, maybe both. My only question was about the sealing gasket / o-ring still holding pressure after sitting 10 years in storage.
I've used filters that were almost 10 years old without issue in my old Firebird. As long as it was stored in a climate controlled environment and it's not rusty, I say go for it. They held up fine for me using 3k OCIs of fairly hard driving and long periods of time without being driven.