I like cars that don't drip fluids and try and keep mine that way. I seem to have the most problem recently at the oil drain plugs where I'm getting minor drips from both of my cars. I changed the gasket last oil change thinking the old one looked about worn out. The old one never leaked. I used the same gasket material to make a new gasket and it didn't leak for a month but now has started. Yes, I've tried to retorque but it hasn't helped and cleaned the flange area on mating surface of plug and oil pan. In the past I've tried both aftermarket copper and nylon washers and they were much worse than the gaskets that I made myself. Has anyone got any suggestions on what has worked for them? I'm considering trying just a large O ring from the hardwares stores. If the nitrle material on the hand-tighten filter gasket can be leak free why not at the darn drain plug when I put 20 or more ft. lbs. on it?