Most of the world wouldn't really care. But I just drove my '04 GP to Michigan and back, and got some fantastic "performance" numbers:
Tank 1: 34 MPG
Tank 2: 36 MPG
Tank 3: 30 MPG (included local driving near my vacation spot)
Tank 4: 33 MPG
Tank 5: 32 MPG
So - I drove about 2,100 miles on 5 tankfuls.
And BTW I passed 290k on original drivetrain. Not to mention, the interior and exterior of my car look amazing- I could easily tell an uneducated person that my car is less than a year old.
Love these cars.
-Bob C.