Bought 2015 QX60 AWD in mid october.. After around 1200 miles I am getting nearly 14-15mpg in city. Numbers could have been better but mostly the car is being used from home to school and grocery stores at the moment. On highways the numbers are much better (24-25 mpg).You should notice a significant improvement after a couple gas tanks. Don't rely on the vehicle's fuel milage indication until you have run a few tanks of gas. My first tank was around 16 but quickly moved up to 20 mpg mixed driving and 24.5 highway. If by chance you continue with poor milage, take it to the dealership's service department to check it out.