[ttimbo]

Just under 12 months of records, and 18,000 kilometres travelled in my M135i, my long term average fuel consumption is 7.87L/100k, with a worst of 11.08, and a best of 6.76L/100k. This is all data based on fuel fill logs, not the car's computer.
Yes, I use EcoPro whenever I'm on a speed controlled motorway, along with cruise control.

I'm pretty impressed with these 'performance' results, especially as they're a good 2L/100k better than the Audi 8P S3 it replaced.