This thread makes me want to apply Torque Seal to the oil plugs and elsewhere before I take my bike in for service. It's a thick gel pooky that sets up hard. You just run a small bead of pooky across the bolt or plug to the housing. If the bolt or plug is twisted at all, the pooky cracks. It's used in the aircraft world to tell if a bolt is loosening. Google it, but you can find it at Aircraft Spruce and Supply on line. AS&S is the best aircraft homebuilders supply house.