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Re: [Phys-l] Hybrid mileage

I've had the same experience. Perhaps it has to do with the temp dependence of battery performance, so that the engine has to be used more in the winter, hence the lower gas mileage. Just a guess.


Joseph J. Bellina, Jr. Ph.D.
Professor of Physics
Saint Mary's College
Notre Dame, IN 46556

On Jan 5, 2010, at 3:16 PM, Robert Yeend wrote:

A colleague asked me why it is that she consistently gets 6-8 mpg
less in the winter than summer with her Prius Hybrid. Her mechanic
said that that was "normal," but gave no explanation. Nor can I. She
said that she uses the heater in the winter about as much as the air
conditioner in the summer.


Bob Yeend
Forum for Physics Educators