Few weeks ago I set off in my z3 , guage was on at least three quarters full. About 30 miles later it was going towards the red , hadn't brought wallet with me so slowly headed home. I could see the guage dropping ! I was in sport mode , driving urban and A roads , switched to normal mode to get home. No fuel leaks , reset mpg monitor and driving carefully was getting 24mpg semi urban. The way it drinks fuel it seems like a 4.2 Jag! Is this normal, it's done 35k miles and emissions are perfect . Or is it because I'm used to a 30d X5 for normal use that sips fuel by comparison.