@ Rob,
Yes, I've got the 1.8.
I'm @ 5200 miles . . . once I hit 15,000 or 20,000, my engine should be FULLY BROKEN IN. I think by then I should be able to hit 45 mpg unless my fuel economy has already peaked, which I doubt.
My brother's xA started getting outrageous fuel economy at around 30K. Before that, he was getting 38-40... after 30K, he was getting 45-48. On his best tank, he got 527 using 10.02 gallons. xA's fuel tank is 10.8 gallons. Identical driver to me: 65 highway MAX, bi-weekly tire pressure checks, coast to stoplights/off ramps, etc..