I have been reading this board for years, it is a great place. Here I share my experience with my 2004 Jetta GL PD Wagon(made in Germany), stick shift. For the past two years or so, I have been filling my tank with B5(ULSD), every time I fill about 14(+/- 0.2) gallons. My best tank was 750+ miles, my worst tank was 690+ miles(last winter), except which I have always maintained 700+ miles per tank. I checked my odometer against the highway marks(upto 300 miles), it is accurate in the 5th gear(even slightly under estimates), I don't know whether it is accurate in lower gears, never bothered to check. I typically drive 80 to 90% high way, at various speeds(as fast as the traffic allows). I guess one thing many owners could have neglected is the tire pressure, the manual says 45/36psi, I pump the rear tires to 45 as well(by the way, the local stealership is really stupid, they lowered my tire pressure to 30psi when I brought my car in for the first two free oil changes.)