crazy leak
I experienced the same problem and found no one had any real answers.
pulled the engine and found that the head was leaking from an oil pressure port. Evidently when the dealer warranteed the headgaskets, they used a belt surfacer and the head was no longer truly flat. Rebuilt the heads, cut the mating surface and solved the problem. Lots of work, but thank the dealer for real quality work. You'll find that nobody seems to know about headgaskets leaking oil (under pressure), but I have certainly been there. You might consider putting in some head studs while your in there.