Making your oil changes sooner than recommended wont solve your problem......trust me.
I got the same issue as you when I bought my 2011 Q5 (2.0 TFSI) at 99,000 kms..was burning 1L / 750-800 kms which was above Audi Standards.
I knew when I bought the car that the 2010 - 2012 model years were problematic for oil consumption so I bought a 2800$ extended warranty (PPP), good for an additional 100,000 kms/5 years.
2 weeks after I got the car, I brought it to Lauzon and they performed the engine fix (6500$ total). Don't need to tell you I was so happy I got the warranty...!!!
Your V6 s/c probably suffer the same problem. It runs strong and performs normally despite the oil consumption but, it's still annoying to add oil at such low intervals...I'm 99% sure that you need an engine rebuilt like mine...and it should cost fairly the same.
Find a good dealer that you trust and make arrangement with them. Audi Canada is aware of the problematic and can arrange to split the fees between you and them so it doesn't hurt too much...
Oh, and since i got the engine rebuilt (80,000 kms ago), it doesn't even drop 1/10 on the MMI meter after each recommended interval of 15,000 kms...!!!
Car is in the garage now getting the pcv changed . I will get it flashed at audi and see if that fixes the Oil burning . .
Anyone knows a good service guy at audi who won't rape my wallet just to flash and update the ecu ?