@Ren13 people who know me well, they also know how big car fanatic and attention detail seeker I am. After spending half of my life in Dubai, I always double check everything when it comes to my cars, no matter whoever (technician / mechanic) touches my car. I check oil level every week in all my cars and same I have done in this scenario too, oil level was much between two lines just a tad shy than upper mark (great).
Yesterday it was little below the lower mark. And gap between two lines is over an inch to let you understand the engine oil maths going around. I topped up with Mobil1 around 800ml and now waiting to observe further now.
I have only topped up engine oil in my Cayenne turbo every 1500 kms, as advised in manual and as alerted by car in dash reminder "Low oil" other than that I never topped up engine oil until the next service - be it 5k, or 10k. This was indeed weird and that's what making me little paranoid that how why engine can reduce 800 ml in about 3000 kms in 3 months......?