FIL found some old Nissan OEM filters in his garage. They are the 15208-9E000 Made in USA. I figure they are probably at least 15 years old. I opened one up and the filter looks to be in good shape externally with no signs of rust and the gasket looks good also. Only concern I would have is the media. Could these bad boys withstand a 5000 mile OCI if I used them in the Q50?
How old is too old?
How old is too old?