... for sure... the rubber will fail over time. OP wanted a quick fix for 1200miles prior to replacing the pan when trip was over. I used this type of plug out of desperation as I lived in Northern Ontario... it was winter... I did not have a garage... I was a poor student... I needed a quick fix like the OP (and like the OP I intended to replace the pan eventually... In my case I waited un til it was warmer out).