I've done about 1100 miles now, most of it on motorway driving at 70mph... i'm still only getting 33mpg UK (equivalent in US is 27mpg)... I don't drive particularly easily, but at the same time i'm not too hard on it either.... I've spoken to my dealer about it and he says to wait until 2000 miles and if I still have an issue with it they will take it in to run diagnostics on it and make sure it is tuned up properly.... they said that other drivers have been getting mid 40's (about 37 US) doing similar distances, so i'm not sure what the issue is. I'm starting to wish I hadn't got the CX5, as the main reason I bought it was for it's supposed great fuel economy, given the soaring price of fuel these days.