Burning oil

What if it's not the rings or the guides or the valve seals
but rather, the PCV system sucking liquid oil out of the valve cover. I mean IDK how that could happen,(well I do but that's another story), but it's just a thought.
If your crankcase is overfull the crank will whip the oil into a frenzy and the PCV will be happy to pass it right along. Since both times it happened right after an oil change, I'd be checking into that

Just flip the PCV out of the valve cover and watch the hole. If your rings or guides are done, yur gonna be sending smoke to the moon. Vast quantities of it.
But if you get only air with a lil oil, then look elsewhere. Lots of air with only a lil oil dos not mean yur out of the woods tho. Liquid oil splashing out would be bad,very bad.