You are 100% right! I am an automotive instructor and teach this everyday.
Todays new autos must run hotter to help keep the emissions low.
Wayne in MA.
>
> Date: Thu, 13 May 1999 17:17:18 EDT
> From: SuperNagz@aol.com
> Subject: Re: DML: Re: 180 thermo (hurts mileage)
>
> Well then maybe there were some other variables involved that somehow managed
> to get you greater mileage.
>
> All I am saying that it is a thermodynamic principle that clearly states the
> lower the temperature, the lower the efficiency of the cycle... and of
> course, the opposite holds true... the higher the temps, the better the
> efficiency.
>
> Keep in mind, I am talking about the operating temperatures... and not the
> incoming air temperatures... we all know the cooler the incoming air, the
> more dense it is... the more dense it is.. the more oxygen it contains...
>
> This is not a flame in any way... all I am simply stating is that, "all
> things held constant... going from a 200 to a 180 degree t-stat will yield
> lower mpg"
>
>
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