No extra oil here.........
I have (as of today) 151400 and something km on the clock on my 2011 D4 3.0L HSE.....between oil changes at every 13,000km my vehicle did not use (according to the electrical gauge) any oil. however I have noticed over the last 12 months is that after an oil and filter change the oil level drops slightly then sits steady until l the next change.
The electronic gauge shows that in the first week or three after an oil change the level drops one notch then that is where it sits.
What that means....well.....I haven't got the faintest!
Over the last four plus years I have lived with the D4 there has never been a requirement to top up the oil between changes....I do tow trailers and a 1.5t camper trailer......and as I said I am changing oil at a higher frequency that that recommended for most!