Is the Audi Euro 3.0 the same as the CATA engine in my Touareg, only tuned a bit stronger? If so, my aluminum wear was half what you are showing at a still breaking in 9,000 miles.
Do you have any other UOAs on this engine that would show a trend on aluminum wear? Regardless of Blackstone's averages, I would think 32 ppm on an 80,000 mile engine is too high.