Patrickt's suggestions are good and will stop most of the leaks. However I had one on one car that I could never get to stop completely and I finally noticed that one of the bolt holes was just a very little bit larger than the rest. This after I had bought a new set which never leaked. I put the old set on another car and put made sure that bolt hole was flat on the bottom side and put some extra seal around it and so far they haven't leaked any. But an FE is an Fe and I think they were designed to have small
oil drips from some source.
Ron