I had b6 audi avant 2.0 20v petrol engine that drank oil

was better with 10w 40 oil. Meant to be 5w 30 I believe.
I research quite a bit on audi engine using oil and its very common.
I was reading about new v8 engines using 1litre of oil every 1000 miles. (New engines!)
Unfortunately these engines do drink oil so you will have to keep topping up.