The miles remaining displayed in the IC is based on a fixed efficiency coefficient for the car, so it is derived from the remaining kWh in the pack * the coefficient--I am not sure anyone has determined the coefficient for the new cars. The only thing you can change is wheel size, which changes the coefficient. The energy apps shows range based on recent driving behavior, but so far, we don't have that yet in the new FW.it's calculated off your recent driving patterns. someone still is enjoying the acceleration