The 2011 Acura TL doesn't get much better--or worse--mileage than you might expect from a somewhat heavy sedan with a V-6. Front-wheel-drive 2011 Acura TL models get 18 mpg city, 26 highway.
With either the six-speed manual gearbox or five-speed automatic transmission, the all-wheel-drive versions of the TL achieve an EPA-rated 17/25 mpg.
But, as our editors have experienced in a longer drive of the TL, you might be surprised to find your results in the upper end of the range. In about 400 miles of cold-weather driving--about two-thirds of it on the highway, but most of it taking advantage of the TL's engine--we averaged nearly 23 mpg, which is better than we would have seen from most other mid-size luxury sport sedans.