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Politics : View from the Center and Left -- Ignore unavailable to you. Want to Upgrade?

To: Suma who wrote (20875)	6/13/2006 3:43:33 PM
From: TimF	Respond to of 541126

The reason it gets better mileage in City. The electric engine works in the city whereas the gasoline kicks in over 40mph. I would think that the fact that it sometimes runs with the gasoline engine off in city driving would make it impossible to get a real mpg figure. You could say it is infinite when the gas engine is off, but not really as the electric motors work off of energy from the batteries and that energy derives originally from burning gasoline. Your burning gas at time x, and getting motion in the car from it at time y. Some of the charging is from regenerative breaking which happens more in city driving but I think the engine is used to charge the battery when its low even if your not breaking.