Need to wash my 3.0d after 2,500kms of hard road trip, including two ferry crossings of NZ's Cook Straight. It never missed a beat in the whole trip and returned some stunning economy results...
(*edit* - that's 35.6mpg (US) or 42.8mpg (UK) for those of you not familiar with L/100km.)
I always reset the consumption #1 calculation and the trip counter when I refuel (to a full tank), so if you add the trip to the range calculation, you get an idea of just how far these things can go on a tank at highway speeds...
I reckon 1,400km on a full tank is just about possible!!