I got “low oil level” warning last week after driving up into the mountains to ski. I added 750ml - but the oil level was steady for the 1000+ mi prior to that.
Co-incidentally, this had happened twice last year (to a different mountain) before I later discovered I had a torn membrane in my oil separator-and a whole lot of oil sitting in the IM. Both have been repaired last Dec.
I did notice there is a slight vacuum in the oil cap at idle. Nothing noticeable with the dip stick, though. No misfires, the only engine code I get is:
Engine
Part #: 4F1910552A
Component: 5.2L V10/4V FSI
Coding: 01050009190F0260 (hex)
Fault codes:
P1647 Please check coding of ECUs in Data Bus Powertrain
Thoughts?