If you understand the data in this thread, you'd understand how some filters can be very efficient all the way until they are almost clogged up ... ie, high delta-p across the media, which won't happen on an engine unless the engine is a complete sludge monster. Changing out an Ultra for instance at 5000 miles is a waste, and that's why some people run them for two or three 5000 mile runs on engines in good health.
Granted, some filters are better than others for longer OCIs, and from what I've been seeing most of the big brand filters make's claims are relatively accurate on the filter efficiency and rated use period. So what I'm saying is don't use a filter that's rated for 5000 miles for 10 or 15K miles. Pretty simple.
I have this as a “watched” thread, so if you do happen to start a new one, could you put a note or link in this one to direct followers to the new thread? Thanks!! Yes, no problem I can do that.
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