First fillup in the '11 Buick Regal non-turbo: 22.96 mpg over the last 13 days, 70% city driving, about 65 mph on the interstate, on non-ethanol regular, tires at 34 lbs. A little lower than I'd hoped, though not out of line with what other Regal drivers report. The Average Fuel Economy readout was around 23.4-23.6 for the last few days as it established its baseline, so it's not far off, unlike the 10% too high figure the Park Avenue always gave. The weather has been chilly and damp here too (though nothing like what many Midwesterners and Northeasterners have been going through).
This time I zeroed out not only the Trip 1 odometer, but the AFE readout and the average vehicle speed. It'll be interesting to see what they report in two weeks or so.