the grey & green bar meter on the lower left gauge clearly shows very accurately what the fuel and battery charge discharge is doing. Very interesting and indicates what's happening at all driving phases when out for a while.MPG has everything to do with how you drive. Obviously, this is even more paramount with the LC since you can drive for miles on battery if your RPM's are low enough. The Toyota Prius would actually show you when you were driving on battery versus fuel in their hybrid system. I think this is the difference why I'm getting 22-25mpg and others are only getting 18-19mpg.