Just moved from a 2011 e92 320d mSport manual to a 420d mSport sport auto. Had the e92 for 3 years and 39000 miles and when we parted company (sob
) the lifetime mpg was just over 54mpg. Only had the 4er for 6 weeks and so far on the 2000 miles on it mpg is at 52.5. I was hoping for a little better I suppose, but we'll see.