I was so upset when I changed my oil for the first time two years ago and couldn't get the filter off.
In a rush, because I was committed to a road trip with friends the next day, when I finally dropped the oil pan I just stabbed the filter with a large screwdriver and took out my frustration on it (grrr). No time for niceties, just put the oil pan back on w/o gasket sealant.
OK, fast forward to the next oil change last summer. Oil change going smoothly filter removed through normal access plate, screw the plate back on with fresh o-ring. Just three little hex screws to tighten and I'm good to go! Start pouring in fresh oil, then--oil leak! Oil Leak! Running all over the deck coming out of the oil filter cover plate!!
WTF?
Seems the o-ring popped-off slightly and pinched while screwing the access plate back into place. So, captured as much of the new oil as possible into an aluminum pie pan, cleaned up the remaining mess and prepared to start over (muttering to myself--idiot!). Didn't have another replacement o-ring, so ended-up re-using the old one.
Over the summer made a special trip to MaxBMW (~80mi.) on the coast in NH just to purchase two sets of o-rings and crush washers (I already have 2-3 oil filters). "Anything else today sir?" says the pretty counter lady. "No," sez I, "that will be all. Thank you kindly." (She's thinking, 'What an idiot.' I'm thinking; 'I'm an idiot.')
So, now I have complete back-up, and will back-fill my inventory every time I change oil.
Now the bike's in the barn for the winter AND it needs an oil change. There is crud build-up all around the oil pan, so will remove the oil pan and seal everything up properly once and for all.
End of story.