Son of a bitch! Well, I just checked my stock. I have 5, made in Japan, new old stock, OEM filters. At 4K-5K miles a year I'll be good for quite some time.
BTW, based on my service records my '92 has had genuine OEM filters since it had about 15K on the clock and it still has it's original timing chain tensioner with zero rattle. Any correlation? I can't say, but at very least it does my heart good to see a pretty, white OEM filter hanging off the side.... like the teet of mother Nissan feeding it's young.