Quote Originally Posted by Throbbinhood View Post
Went for a fourby in Toolangi before bubs came along. Airing up at the end of the trip, noticed some oil had dripped down onto the diff. Got under and had a look, and seemed to be coming from the front passenger side corner of the sump gasket area. Could have been dripping down the Timing cover, with the dirt and mud from the trip was hard to tell.

Got it home, gave it all a good wash and took it for a drive locally hoping to give me a clearer picture of where it's coming from - but now it won't leak!

Sure enough, if I go any decent distance it will decide to empty itself out, so want to track it down before the next trip. Thinking it's possible that maybe the oil moves to the front of the sump when I go down a hill and leaks out from either the sump or some other seal, so I need to find a steep hill near home to confirm my suspicion.

Frustrating.
Well, if I hear you correctly, I would stop driving it right now and get to the bottom of it.
Oil vanishing into thin air is a serious concern for a relatively younger engine.

I would drain the oil completely and have a good look at the oil, whether it has too much soot in it or not.
Use 20/50 and see how it goes. I remember during central oz trek, mine did the same thing when I put 10/30(or 15/45). By same thing, I meant oil level dropping rapidly without any leaks. I experimented with 15/45 during this summer for local errands. The oil level did not drop, other than blowby getting worse. So, I reckon worn out engine/thinner oil/higher rpm longer drives is not a good combination.