Rather an aggressive reply again Nubian, sadly all too common on social media nowadays.
I find it unlikely that a glob of neat oil could find its way back through that system to the exhaust.
Pretty thin skinned then Crab, if you take my last post as aggressive. I’ll take that into considerations later.
The neat oil you’re finding unlikely to find its way back, will be coming from the reservoir as it circulates back. In a low G/negative G situation there is a couple og litres pushed to the top of the tank, and the vent line has no valve restricting flow out to the exhaust pipe.