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Re: [Phys-l] Hybrid mileage

Part of the loss of mpg in the winter for a hybrid (and all other cars) is that the engine has to run longer to bring the catalytic converter up to temperature to meet emission reduction requirements. And the engine has to run more to keep the converter up to temperature.


In a non-hybrid anyway, you run the engine for however long you want, whether the CC is up to temp or not. Are you saying the temp of the CC affects the gas useage? And/or, are engines tuned to run at slightly higher rpm to provide extra energy to keep the CC at temp?

I don't quite get the full extent of your description. If you could describe things in terms of energy generated/expended rather that "engine running longer/more" it would help.

Stefan Jeglinski