I have the DMI washers/seals on two different engines using Milodon single line external oiling w/ static pickups. One seeped a little oil from day one. A thin coating of silicone b/t the washers and around the fittings stopped it and has been leak free ever since.
The other required no sealer, just the supplied O-rings, and has been leak free.
The DMI washers/seals did not work without mods on my Milodon pan because the hole in the pan was too big. I modified it to work. I am an o-ring junkie, and everything that I can o-ring I do. I had zero leaks on the race motor while on the dyno.
