audi2011

I have a 2011 audi q7 3T, I bought it used at 17 000km and the first time the engine oil light came and i topped it off. But the light came on every 1000-1200 km from August to Septemeber.

I contacted the Audi dealership and they told me to bring it in for a part 1 and part 2 test in which they "checked for tsb, depressurize fuel system , removed super charger unit 9151-2 removed fuel rail 9151-3 and replaced oil seperator with updates parts 9151-4 reinstalled fuel rail with new gaskets 9151-5 reinstalled super charger 9151-6 performed svm update as per tsb 9151-7 performed gff scan performed part on oil consummption. filled 5250 gramms at 22702km. Part 1 and Part 2 were done between 22702km and 23761km.

The engine oil light is on again at 28000km. Is there a problem with this vehicle? What should be the next step