....the crankcase drain on the bottom or back of the engine
(Saitos) allows all the pressue....blow-by....oil....and
anything else gets blown out of the engine on every stroke.

I just serviced my Magnum .91FS....and the rocker area was
deviod of any fluid, what so ever. The motor was mounted sideways.
Whatever oil, or grease that was in the rockers
had been flung off, and collected on the sides of the
rocker box, and had hardened.

It was dry as a popcorn fart. The cam box had some grease
in it.....but was devoid of oil, or any liquids as well....

I have an OS .90FS mounted inverted in a plane with several
flights on it. I'm gonna check it and see if oil runs out of
the cambox.....I don't think it will, however I would certainly
be delighted if it did.... ....even if it does, it doesn't
necessarily mean that any oil got onto any moving parts.

Dave.