Very economical they say, 50mpg when cruising rather actively during my 700km roadtrip. 3-liter straight six, very nice. However, using a passing lane I noticed two trucks ahead and thought that the remaining 500m of double lanes to a strong uphill would allow for a safe overtaking. Well, making it safe resulted in the end speed of 150km/h -Polices posted at the top of passing lane were happy to give me a four figure fine. I've started thinking if something like 318i would be a wiser choice..