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.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
| 
