when you say its based of the standard consumption, the vehicle has only done just over 1000kms, and if you do a manual calculation i.e. Car came from dealer with full tank of gas 22km on the clock, after 550km I fill the tank up with 39litres of fuel that equates to a consumption of 7.09l/ 100km. The fuel tank holds 55 litres but lets say 50 then surely the range to empty should read 50 divide 7.09 times 100 = 705 or at least somewhere near this