My 58 plate averages 38 to 39 mpg on typical extra urban use. ie. Mixed speeds but mostly open roads with speeds up 60 mph and some 30/40 limit mileage. My Volvo S60 D5, 2 years back, used to average 43/44 mpg with the same driving conditions. The extra weight and bigger frontage of the XT probably explain the difference. I will shortly be changing to the new shape XT and hope to see quite an improvement in mpg as the Combined consumption figure changes from 38.2 to 44.1 so I hope to get 44/45 mpg for the same driving conditions.