This one had only 4k on the oil, IN fact it's as clean as you could expect to see. This truck's NOT neglected, it's overmaintained. That's what bothered me, this is MY filter, and I don't like when my parts let go.
I checked those patent numbers and they're all to Hengst and Parker Hannifin. The filter is a Donaldson, and the OE is Hengst, right? That makes this an OE filter.
I've never seen one of mine fail yet, always the Brand X ones.