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Northern Hemisphere cool down

Discussion in 'Fred's House of Pancakes' started by bwilson4web, Oct 17, 2017.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    The seasonal weather change, Fall, recently brought Dixie temperatures down ~20F (~10C) and sure enough, our tire pressure alarm came on.
    Source:
    Intellicast - Mixed Surface Analysis in United States

    [​IMG]
    So I topped them off this morning (i.e., cold tire pressure) and found a 30.5 - 34.0 psi range.

    If you have tires, cold weather reduces the pressure and leads to more rolling drag. Since the normal threshold is about 10 psi for a low pressure alarm, I like to run door jam +10 psi. When the alarm comes on, the car is at what Toyota thinks they should be. <wink>

    Bob Wilson
     
    #1 bwilson4web, Oct 17, 2017
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  2. bisco

    bisco cookie crumbler

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    54 today, 74 tomorrow. a/c last week, heat this morning.
     
    #2 bisco, Oct 17, 2017
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  3. RRxing

    RRxing Senior Member

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    Rule of Thumb - 1 psi tire pressure (up or down) for every 10 degree F ambient temperature change (up or down)
     
    #3 RRxing, Oct 17, 2017
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  4. Mark57

    Mark57 2021 Tesla Model 3 LR AWD

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    Larger sized tires can be up to 2 PSI per 10°F. I mention this because many here own other vehicles other than Prii.
     
    #4 Mark57, Oct 17, 2017
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