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Is MPG inaccurate?

Discussion in 'Gen 4 Prius Fuel Economy' started by Jdpl76, Apr 19, 2024.

  1. Jdpl76

    Jdpl76 New Member

    Joined:
    Oct 21, 2023
    7
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    Location:
    Artesia, California
    Vehicle:
    2016 Prius
    Model:
    IV
    I bought my car used and the MPG was around 43 when I got it. I have noticed since I changed my spark plugs and also drive fuel-consciously that my MPG is going up but I never expected to see it this high. I'm guessing it's inaccurate or is 50+ normal for 2016?
     
  2. Jdpl76

    Jdpl76 New Member

    Joined:
    Oct 21, 2023
    7
    1
    1
    Location:
    Artesia, California
    Vehicle:
    2016 Prius
    Model:
    IV
  3. Mendel Leisk

    Mendel Leisk Luddite

    Joined:
    Oct 17, 2010
    55,106
    38,468
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Our 3rd Gen (model year 2010~2015) dashboard-displayed mpg has proven to be approximately 7% optimistic, compared to calculated. I’ve read here that 4th Gen (model year 2016~2022) is similar. FWIW 5th Gen (model year 2023+) is reported here to have fairly honest dashboard-displayed mpg.
     
  4. Doug McC

    Doug McC Active Member

    Joined:
    Feb 15, 2022
    995
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    Location:
    Midwest
    Vehicle:
    2022 Prius
    Model:
    XLE
    On my ‘22 typical warm weather mpg hovers in the low 60’s with cold weather hovering around 55. Both indicated (I have more interesting things to do than make spreadsheets to determine the “exact” mpg which is nearly impossible to do anyway).