>The best thing to do with the drain plug once you get it out is to throw
>it as far as you can. Go to an auto parts store and get a replacement
>plug with a conventional hex head. Put that in the place of the old one
>and forget about using anything more special than a 17mm socket.
I posted about this a while back, but maybe it bears repeating. I like
the Fumoto drain valve, available from Imparts, (800) 325-9043. No need
for any tool to change oil.