A method of operating a motor vehicle satellite navigation system using a motor vehicle's structure and characteristic information to calculate a best route to a desired destination. The method includes operating a graphical user interface (GUI), presenting display images for receiving input data for the desired destination and receiving satellite position data, and calculating a current location of the motor vehicle. The GUI presents a display image requesting motor vehicle structure and characteristic information. The method includes calculating and updating current best routes to a desired destination using map and POI databases comprising geographic coordinate grid and point of interest information from the current location and motor vehicle structure and characteristic information. The motor vehicle structure and characteristic information reflects static vehicle structure and characteristics such as size, fuel type, engine efficiency and fuel capacity, and dynamic information such as current fuel level and real-time traffic and road condition information.