Long term owners mpg

Discussion in 'Gen 3 Prius Fuel Economy' started by mengoni, Mar 16, 2019.

  1. mengoni

    mengoni Junior Member

    Joined:
    Dec 16, 2015
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    Location:
    Kansas
    Vehicle:
    2010 Prius
    Model:
    III
    I have a 2010 with 130,800 miles. I bought it used in Dec 2015. I even posted the best tank mpg on the dash with over 58! I haven't seen any mpg change except for seasonal. Just filled up a few hours ago and calculated 52.83 mpg.
    My question for the long term owners is have you noticed any mpg drop in the years you've had your car

    Posted via the PriusChat mobile app.
     
    Aaron Vitolins likes this.
  2. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
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    Location:
    Bay Area, CA
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    We have 198k miles on our 2010 that we bought new in August 2009 and I’ve averaged around 50mpg with most of that at freeway speeds :).

    There were a couple of times when it began to dip with explainable causes:
    • Egr system was plugging up
    • Hv battery was degrading
    • Winter blend of gas
    The egr circuit you can clean with the right tools, the hv battery Hybrid Automotive makes the Prolong equipment. Not much you can do about winter blend gas:cool:.

    Good luck with your new to you Prius (y).
     
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  3. drroone

    drroone Junior Member

    Joined:
    Jan 20, 2014
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    Vehicle:
    2010 Prius
    Model:
    II
    I'm averaging about 42 mpg and have been for a while. I have 128k on it and haven't really don't any maintenance beside oil changed. Any recommendations you'd suggest. I bought the car used and while I first got it I was up in the 48mpg area but it's definitely dropped off.

    Posted via the PriusChat mobile app.
     
  4. Raytheeagle

    Raytheeagle Senior Member

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    Location:
    Bay Area, CA
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    Is it a winter time thing, or the other factors mentioned above? Hard to know without your location being listed;).

    If the driving trips are not short which hurts mpg, at the mileage you are at the egr cooler is more than likely starting to restrict:(.
     
  5. MacArthur

    MacArthur Junior Member

    Joined:
    Dec 4, 2011
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    Location:
    Great Falls, VA
    Vehicle:
    2011 Prius
    Model:
    II
    Same here, 2011 Prius, about 129K, Bought the car in northern VA, could easily go over 60mpg back then.

    Now I'm living in central NJ, Daily commute is around 45miles, mostly highway. It has been around 44-45mpg most of the time in Winter. In summer it's a little better, can go up to 48~49mpg, but never reaches 50 again.

    Guess I'll have to live with it - whatever you do, whether cleaning the egr valve or replacing the hv battery, it all costs money. And MPG just got improved a few extra miles... perhaps I need to drive another 129K to make it up.
     
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  6. GardenWeasel

    GardenWeasel Member

    Joined:
    Jul 25, 2009
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    Location:
    Columbia, SC
    Vehicle:
    2010 Prius
    Model:
    III
    I bought mine new and now have 136,000+ miles. When I quit tracking my FE, I was averaging between 52 and 53 mpg. I hardly ever had/have a tank of fuel that gets below 50 mpg. Tires have made the biggest difference in FE...with my current Michelin Defender’s performing quite nicely.
     
    Raytheeagle likes this.
  7. ewxlt66

    ewxlt66 Active Member

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    Location:
    Dana Point, CA
    Vehicle:
    2015 Prius
    Model:
    Two
    Wife commutes 50 mi round trip in ours. Averages about 49 with LRE tires 10psi over manuf. spec.
     
  8. CR94

    CR94 Senior Member

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    Location:
    Northwestern S.C.
    Vehicle:
    2011 Prius
    Model:
    Two
    Long-term is holding near 57 mpg actual.
     
  9. sprintr

    sprintr Junior Member

    Joined:
    Oct 9, 2014
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    Location:
    chicago il
    Vehicle:
    2014 Prius
    Model:
    Two
    I have a 2014 with 150.000 eighty percent expressway average 54 to 61 has gotten better with age. makes me a little nervous.
     
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  10. jadd806

    jadd806 Junior Member

    Joined:
    Dec 5, 2015
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    Location:
    MA
    Vehicle:
    2015 Prius
    Model:
    Persona
    135k on my 2015 Prius with 383 fuel ups tracked, 46.2 average MPG in New England.

    Definite decrease over time but I attribute it to driving faster and caring about MPG less as I've owned the car.

    Capture.PNG
     
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  11. Vman455

    Vman455 Active Member

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    Location:
    Champaign, IL
    Vehicle:
    2013 Prius
    Model:
    Two
    If your car is kept in good condition, there shouldn't be any change in fuel economy that isn't attributable to driver practice and external factors (traffic, weather, etc.).

    As an example, at the Green Grand Prix a few weeks ago (so, all cars running on the same closed track under the same conditions), my Gen 3 with 75,000 miles and a few aerodynamic modifications posted better fuel economy than any other non-plug-in Prius there. I got 59.7 mpg; the next closest was a 2019 at 57.5 mpg.
     
  12. Danny3xd ()

    Danny3xd () New Member

    Joined:
    Sep 30, 2018
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    Location:
    Connecticut
    Vehicle:
    2010 Prius
    Model:
    Three
    When I got her, 38 MPG. (2 brake pistons were sticking) 48/49 MPG now.
    Spring time in CT, U.S.
     
    Raytheeagle likes this.
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