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Mileage?

Discussion in 'Gen 2 Prius Fuel Economy' started by gfjg59, Feb 19, 2024.

  1. bisco

    bisco cookie crumbler

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    So you’re experiencing the bladder problem and it’s hard to know how much is in the tank.
    Long term averaging of miles and gallons pumped should be reasonably close though .

    get a free load test at auto zone
     
  2. gfjg59

    gfjg59 Junior Member

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    sorry, don't know what that means.... Bladder problem meaning that there could be more gas in my tank than what the gauge reads?
    The load test is for the amount of charge on my battery? Thank for your help
     
  3. gfjg59

    gfjg59 Junior Member

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  4. vvillovv

    vvillovv Senior Member

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    #24 vvillovv, Feb 20, 2024
    Last edited: Feb 20, 2024
  5. bisco

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    the bladder can shrink over time, and in cold weather. if you're only getting six gallons in from empty, it sounds like that.
    the load test measures battery capacity in cca (cold cranking amps) and voltage under load.
    best way to determine if it is good or bad.
     
  6. gfjg59

    gfjg59 Junior Member

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    let’s talk bladder issue…the real question is
    what does the number of gallons the tank matter for MPG?
    6 gallons= 150 miles
    12galllons= 300
    what does a faulty bladder have to do with mpg? it’s still 25mpg
    am i missing something??
     
  7. bisco

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    if you're calculating the mpg after filling up, it doesn't.
     
  8. Juni_puris

    Juni_puris New Member

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    It seems like your problem is related to This.

    I recently purchased a 05 Prius at 140,000 and I kept all my refuel reading. I drive highway mostly ( avg 65-70mph, 1-2hr/day, refuel every 430mi). I live in southern us it's 0C winter and 20C currently.

    Here's what I have experienced: there's no mileage/gas bladder size difference between seasons.
    But on my first 2 trips after driving the car off lot to be 27mpg/32mpg.
    Then it slowly climb up increasing 2-3mpg every time I refuel until it peaks at around 49/51mpg.

    I'm averaging 50mpg right now.

    Since you have mentioned that you drive it light, I would like to think it's because the car's computer need to relearn from driving harder on highway speed.