Newly rebuilt motor, did the first oil change and after that it started leaking from the plug. Not a lot but enough to annoy me. At the second change I looked closer and the plug gasket/oring is not tight against the pan for about 30 degrees. I used some teflon thread tape and 2 gaskets so now no leak but way annoying. Builder used a new pan, probably some crap chinese piece. Not on talking terms with him, besides he is 300 miles away. Any suggestions or do I use 2 seals and tape for the life if the car?