Seriously Bobert, I would replace that oil pan. JB weld ain't to be trusted over a period of time. I did use something named steel putty epoxy to fix rust holes in the oil pan on my old Ford pickup but it is more or less disposable since I got my newer Chevvy pickup. I use the Ford to haul stone and stuff.

I got another story about bustin the oil pan in an old Mercedes deisel if you are interested.