Don't do it. If you get a failure in the bond and lose your oil, think of the money that will be lost!!!! If you go to a plumbing supply warehouse, you can get a fitting with an external thread and a shoulder on it that inserts thru a plain hole in sheet metal (your oilpan) and has a nut that screws onto the other side of the sheet metal. There are 2 washer type gaskets, one goes on each side of the sheet metal. This fitting has an internal thread that you then connect your oil line to.