MPG?
My almost stock ED30 gives me roughly 32mpg, sitting on cruise at ~75mph on my way to work (around 50 miles each way, just outside of rush-hour leaving around 9am). I must admit though, this is usually travelling a relatively busy road, so it isn't straight cruise all the way. There is a bit of slowing down for traffic, but not too much. And that is door to door too, so includes about 10 miles of 2-way A-road, and going through one small-ish town (so one set of traffic lights and a couple of roundabouts). For a straight, several hours of night-time driving or quiet daytime driving, I would expect a little more, maybe around 35 or so.
BUT, my average so far (albeit over only 2 tanks so far), is around 28 mpg.
If you click the banner, it takes you to my page, where it should be easy to see my other cars (if you click my name, xs2man, where it says property of, you can see all my current cars, as well as the stats on my "retired" cars, so you can see how my average consumption compares to the averages for these cars. Since mpg figures are hugely dependent on driving style). My 2013 530d which averaged ~40mpg over 46k, and my 2.0 TDI Alhambra, which averaged also around ~40 mpg over 10k (so far). To give you an idea of my driving styles (pretty good average on the BMW, probably average for the Alhambra, which is also mapped).