Replace damn oil plug

This is about why plug and more specifically - washer (shim) should be replaced every oil change.

Did you notice that washer was deformed and got new edges after it was tighten at previous oil change?
That's because it made from soft metal (or alloy).

When I changed oil by myself, I noticed that old oil did not come out until the most last turn of the plug. It has a good length insuring no oil leaks even without this washer I think. But anyway, just change it as replacement instruction said, wanna save $1 on this? :-)