2003 DX 5mt Sedan, very black and very clean (high speed, low drag--you'd be surprised what a coating of dust can do to your drag coeffiecient!).

Okay, here are the numbers from my records:

40.62
39.89
37.24
39.74
42.44
37.59
40.03

Average: 39.65 statute miles per U.S. standards gallon.

13.2 gallon tank equals theoretical 523.8 miles per tank equals 847.88 kilometres per tank.

Lower than I thought it would be, but still not bad.

I usually drive in a spirited manner. The 42.44 mpg was achieved on the highway, doing between 65 mph and as fast as the traffic was going on Interstate 81 (some hills and curves, lots of tractor/trailers to draft behind).

I fill up at the same pump at the same station, go to the first click on auto-fill and then squeeze one off until it clicks again (you need to allow for fuel expansion within the tank, so don't overfill it).

I'm looking for the top mpg here! Is anyone out there doing some aerodynamic work to lower drag at highway speeds?