Well, after buying my new Jag brand filter, and related supplies, I finally took the plunge and, reaching down to unfasten the old (Mann) filter, could not get it to budge at all, no matter how hard I twisted.
So, I went to YouTube to see the different approaches to try in that situation. I probably watched several dozen such videos, providing at least a couple of dozen of different tools, methods, tips, approaches, jury-rigged gizmos, etc. to get the job done. The one thing I walked away with from all those videos with is one burning question: assuming the PO put the last filter on correctly (fresh oil on gasket + HAND tightening only, 1/2 turn or so after P.O.C.) then how the hell do these filters get stuck on so tightly later on during their life? Seems a no-brainer - if hand-tightened on, it should come off by hand as well. Yet here are all these vehicles, of different makes, models, sizes, mileage, age, etc. and in some cases the filter has to be outright destroyed to get it removed.
Thoughts on this question, anyone?