Every 1500 miles +/-, I drop pan every other change.
I use a different type of oil every time I change, always 10w 40, except in summer when I run 15 w 40, unless I cannot find it, then I run 20w 50.
Unless I have some 10w 40 around the shop, then I just use it, even if it is not a "different" type of oil.
So, I guess my original statement was more of a general concept, not a personal commitment.
BTW:
I re-polish my oil filter housing every time I change the oil.
I add a little Sea-Foam to the oil about 100 miles before I change it, unless I forget, or the mood to wrench & polish hits me and I just change the oil.