I've got 132,000 miles on my 2013 S6, been running APR downpipe and accompanying 93 octane tune since about 70,000 miles and it's run well. I'm starting to get some oil burn which I assume to be the weak rings that seem to be on all Audi engines of this era. I'm considering doing a rebuild and going for more power, but I can't seem to find much information about people building on these engines to see what the limits are.

Does anyone have information on what kind of power this block can hold reliably? What the 7 speed DCT can hold?