yep and you can buy the chip at k-mart,i think.
Might have a chip for it at Pep Boys, although most of the ones I've seen there have been for Chevy/Ford. As for gas mileage check with the EPA: www.fueleconomy.gov/feg/noframes/19535.shtml
Day to day we get 22 mpg that is with 50/50 split between city and freeway driving. On long freeway trips we get about 28 to 31 depending on how fast we average. I have done some limited research on chipping and so far I have found a few do a web search. You will find quite a few for the A6 and if you dig a little further you will find that most companies that mod the A6 will have programing for the Allroad.
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Chris Van Kleeck