Internet and Car navigation

Besides all those hidden fancy buttons and functions to play mp3s, browse internet, watch DVDs in the car, I would prefer getting advices how to save money for gas.

Car navigation system with internet can help car owners to get up-to-date information about fuel efficiency from the car itself and advices to gain the efficiency from the car brand's support center. It is like having a personal assistant sitting in the car.

Is it happening, already? Let me know.