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32mpg?

Discussion in 'Gen 2 Prius Fuel Economy' started by f18cmech, Jan 2, 2019.

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  1. f18cmech

    f18cmech Junior Member

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    Hi guys and gals, getting about 32mpg here now in the winter, was getting 44 in the summer. Whats going on here?
     
    #1 f18cmech, Jan 2, 2019
  2. audiodave

    audiodave Active Member

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    So many variables with your car that can cause this. How's your alignment, air pressure? Maintenance done lately?
    Original battery?

    Posted via the PriusChat mobile app.
     
    #2 audiodave, Jan 2, 2019
    bisco likes this.
  3. bisco

    bisco cookie crumbler

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    do they do winter gas in sd?
     
    #3 bisco, Jan 2, 2019
  4. WilDavis

    WilDavis Senior Member

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    Hey, it's WINTER here in the North East, therefore WINTER = MAX USE OF HEATER, therefore MPG will take a DIVE!

    Q.E.D. ;) Happy New Year, World!
     
    #4 WilDavis, Jan 2, 2019
  5. f18cmech

    f18cmech Junior Member

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    Basically, I did change the 12v battery with a good one
    Well I did replace the 12v with a good battery measuring 450 out of the rated 325cca, and usually has 12.3 volts after sitting a day or two. Is that ok? Other than that, not much else has been done or needs to be done. But, I did notice that the traction battery charges to green rather quickly, but will still pull the car up a small hill on battery alone.
     
    #5 f18cmech, Jan 2, 2019
  6. f18cmech

    f18cmech Junior Member

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    Possibly. Also, my fuel bladder capacity has gone down to about 8 or 9 gallons. Could this give lower MPG reading?
     
    #6 f18cmech, Jan 2, 2019
  7. bisco

    bisco cookie crumbler

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    no, but the best way to check your mpg's is to calculate each fill up manually
     
    #7 bisco, Jan 2, 2019
  8. bisco

    bisco cookie crumbler

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    i can't imagine it gets cold enough in sd for warm up to make a big difference? are you using heat?
    def check tires pressure,
     
    #8 bisco, Jan 2, 2019
  9. audiodave

    audiodave Active Member

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    12 not great but not causing your problems. Clean throttle body, air filter. Tire pressure 36+? Brake not dragging? Tires wearing even? Use any injector cleaner in a while?
    How many miles on the car?

    Posted via the PriusChat mobile app.
     
    #9 audiodave, Jan 2, 2019
  10. audiodave

    audiodave Active Member

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    #10 audiodave, Jan 2, 2019
  11. f18cmech

    f18cmech Junior Member

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    224k miles. I did a front toe in alignment not too long ago. Like I said, the rapid decline happened right along side the dropping temps(40-60) here in San Diego. In the hot months, MPG were mid 40s. But, the HV battery is charging and discharging fairly quickly. Beginning to think its getting close....
     
    #11 f18cmech, Jan 2, 2019
  12. f18cmech

    f18cmech Junior Member

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    Tires were feathering bad, alignment was needed. I run 42/40 on the tire press, although one tire has a "one week leak" and I have to refill it constantly, This along with the remote alarm not working this Prius is not as nice as it used to be...
     
    #12 f18cmech, Jan 2, 2019
  13. bisco

    bisco cookie crumbler

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    --it happens :unsure:
     
    #13 bisco, Jan 2, 2019
  14. audiodave

    audiodave Active Member

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    My mileage goes down a little during winter, I'm 3 hours north of you. But only a few mpg.
    My battery can cycle too. I keep thinking it's going to go but it keeps going. It's a rebuild thats been working for over 2 years. Knock on wood. Lol

    Posted via the PriusChat mobile app.
     
    #14 audiodave, Jan 2, 2019
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  15. f18cmech

    f18cmech Junior Member

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    Indeed, these cars are complex and the energy monitor keeps you in on how it works, but they do just keep going regardless. I need an oil change but thats about it
     
    #15 f18cmech, Jan 2, 2019
  16. audiodave

    audiodave Active Member

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    I get my best milage on the freeway. Short trips around town is 40-44.

    Posted via the PriusChat mobile app.
     
    #16 audiodave, Jan 2, 2019
  17. audiodave

    audiodave Active Member

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    Wouldn't hurt cycling some injector cleaner through it on a couple tanks.

    Posted via the PriusChat mobile app.
     
    #17 audiodave, Jan 2, 2019
  18. f18cmech

    f18cmech Junior Member

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    Something to note, usually when I give it a good shove at take off I'm getting about 6-8mpg, is that right?
     
    #18 f18cmech, Jan 2, 2019
  19. audiodave

    audiodave Active Member

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    That's what the meter says. Not correct.
    You are calculating when you fill yes?

    Posted via the PriusChat mobile app.
     
    #19 audiodave, Jan 2, 2019
  20. bisco

    bisco cookie crumbler

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    accelerating from a stop is energy intensive
     
    #20 bisco, Jan 2, 2019
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