If the leaking seals is indeed caused by a greater pressure differential between the pressurized oil side of the seal and the exhaust side with less back pressure, then why isn't my intake full of oil? At idle or when not in boost the compressor side sees a quite substantial vaccum (not loss of pressure, actual vaccum) so this pressure differential should be gigantic and oil should be gushing past the seals. But yet this doesn't happen. Why? Because the whole idea is idiotic.