I have had a little oil leaking the past week so last night I changed the oil and tightened up the drain plug. The problem, the drain plug would never tighten to what it usually does. Just kind of spins when its in all the way. I am sure I didn't cross thread it as I am always careful of this. I didn't change the crush washer and haven't for a while so I was going to try that. In the meantime I wrapped the threads with teflon tape and put it back in. Tightened up pretty good and hasn't leaked but I don't feel 100% about it. Any advice / ideas?