32mpg?

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

  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?
     
  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?

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  3. bisco

    bisco cookie crumbler

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    do they do winter gas in sd?
     
  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!
     
  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.
     
  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?
     
  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
     
  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,
     
  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?

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  10. audiodave

    audiodave Active Member

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  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....
     
  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...
     
  13. bisco

    bisco cookie crumbler

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    --it happens :unsure:
     
  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

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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
     
  16. audiodave

    audiodave Active Member

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

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  17. audiodave

    audiodave Active Member

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

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  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?
     
  19. audiodave

    audiodave Active Member

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

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  20. bisco

    bisco cookie crumbler

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    accelerating from a stop is energy intensive
     
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