Only 38 mpg right now

Discussion in 'Gen 3 Prius Fuel Economy' started by Frank MM, May 17, 2025 at 2:13 PM.

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  1. Frank MM

    Frank MM Junior Member

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    2011 Prius
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    Four
    I have a 2011 Prius and I'm only getting 38mpg at the moment and I'm quite annoyed. See my post in the troubleshooting forum if you'd like and feel free to chime in.

    230,xxx miles on this bad boy and want to keep it going.

    Thanks all.

    Sincerely,

    Frank
     
    #1 Frank MM, May 17, 2025 at 2:13 PM
  2. bisco

    bisco cookie crumbler

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    could be the 12v, hybrid battery, worn engine, tyres, many different possibilities
     
    #2 bisco, May 17, 2025 at 9:01 PM
  3. nicoj36

    nicoj36 Active Member

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    Do the following:
    1. Clean your maf sensor
    2. Do a bottle of redline fuel treatment
    3. Do the reset on this video
    4. Enjoy your mpgs again.
     
    #3 nicoj36, May 19, 2025 at 11:28 PM
  4. DirkAshburn

    DirkAshburn Member

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    That's what I'm getting on my 2011 Prius as well.
     
    #4 DirkAshburn, May 20, 2025 at 12:27 PM
  5. Grit

    Grit Senior Member

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    Without history of maintaince provided, it can just low tire pressure.
     
    #5 Grit, May 20, 2025 at 10:45 PM
  6. DirkAshburn

    DirkAshburn Member

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    I think its just a weak hybrid battery. I have 165k miles, quite a lot lower than his 230k but I'm guessing he has a lot more highway miles. I check my tire pressure every month, and brakes/etc are all fine. I get the same mpg, 38-39 consistently. My average speed is 23mph in my city commute. I've often thought of just replacing the battery but I think I'll just wait until it dies.
     
    #6 DirkAshburn, May 21, 2025 at 8:39 AM
  7. ASRDogman

    ASRDogman Senior Member

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    What brand/type of tires are you using? That does make a difference
     
    #7 ASRDogman, May 21, 2025 at 8:41 AM
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