Why my mpg does not match promised values?

Discussion in 'Gen 4 Prius Fuel Economy' started by Go-Green-Pal, Apr 28, 2018.

  1. alanclarkeau

    alanclarkeau Senior Member

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    upload_2018-12-16_16-52-55.png

    I don't like the heat of summer - next Friday predicted 37C max.

    I prefer our winters to our summers - temps sorta 10-15C min, 18-25C max. Just perfect!!! Winter might occasionally get down to zero - every 4 or 5 years!! And I've never seen snow - apart from a mountain top about 20 km from where I was touring.
     
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  2. Zythryn

    Zythryn Senior Member

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    Colder air is simply denser air. This affects 4th gen, 3rd gen, 2nd gen and every other car, be it electric, hybrid, or pure ICE.
     
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  3. Mendel Leisk

    Mendel Leisk Lapsed Cargo Cultist

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    I guess what I'm trying to say: besides the physical effects of winter temperatures on the engine efficiency, the computers intentionally change the programming when they read those lower ambient temperatures, when temperatures get below some threshold.
     
    #83 Mendel Leisk, Dec 16, 2018
    Last edited: Dec 16, 2018
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