While driving on the rural country roads near Pittsburgh, we discovered that the Acura MDX’s 3.7-liter V6 is quick, strong, and sounds great when revved. The transmission shifted smoothly, and the SportShift manual feature was quite responsive for up or downshifts. What was our fuel economy for the street-driving portion of the test? We got 15.5 mpg, but this included prodigious testing of the MDX’s acceleration.