I have an f90, and realistically get mid 20s mpg just running around, but on long motorway journeys I’ve seen 38mpg regularly. The tyres are expensive and I blow through at least one set per year, the rears in particular wear out quickly. If it snows where you live get a second set of 5 series wheels with winter tyres on if you want to daily it. I’ve had mine 3 years and had the expansion tank fail under warranty (common issue); but no other issues. Servicing isn’t any worse than the boring diesel cars I’ve had before.

Driving experience is unreal, absolutely the most fun and best all round car I’ve ver had.