I know I have this information somewhere, and I am pretty sure I got if from the forum, but I cannot locate it in my files or on the forum at this time. So, I have my oil drain plug that does not want to cooperate in coming off, and is getting chewed up a bit. I try not to over tighten it, but whatever the reason it is not budging this time around. So I want to get another one to have on hand to replace it when I finally get it off, so is it something like 14mm x 1.5?

 

Just use the smallest size that fits on.
You may have chewed it up enough that you are putting on the next size and chewing it up more.

I take three sockets under there and just fit it.
As I can't remember either.