[Ragnar The Redneck]

FWIW, my US-spec 2015 335i GT automatic, with just under 90k miles, gets 22-24 mpg city (10.2L/100km), with winter fuel formulation getting the lower, while summer formulations get the higher mpg. Highway mileage is 30 mpg (7.8L/100km) in the winter and 32 to 33 mpg (-7.5L/100km) in the summer, at 75 to 80mph. I use LiquiMoly and change oil once per year, I have a company vehicle, so I only drive my personal vehicles about 6k miles per year. YMMV.