Hi Haroon
If your car still under warranty go to the dealer and get your benefits.... if not you may consider a regular major service to your car with the specified engine oil grade (mostly Castrol don't go for unknown brands without prior experience) and spark plugs and filters (Oil & Air) and then you can evaluate the oil burning issue if you do the service by Audi professional workshop they'll see the indication on oil ventilation system and turbo housing for oil burning and guide you.
the other thing that the same engine with the same code is used on VW Golf R & VW Tigwan so don't worry about parts all available (original & aftermarket and even used parts)
You'll be doing the service anyway and remember that dealers push the cars to the limits to keep it running smooth for customers during test drive while everyday driving will not push RPM above 3500 to 4000 RPM which may burn 1 liter for every 3000 Km.
Good Luck and enjoy your new ride!