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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
    33
    5
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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
    11,251
    15,474
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    Location:
    Bay Area, California
    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).
     
  3. drroone

    drroone Junior Member

    Joined:
    Jan 20, 2014
    8
    0
    0
    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

    Joined:
    Jul 1, 2016
    11,251
    15,474
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    Location:
    Bay Area, California
    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
    23
    1
    0
    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.
     
    kevin.c likes this.
  6. GardenWeasel

    GardenWeasel Member

    Joined:
    Jul 25, 2009
    76
    51
    1
    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

    Joined:
    May 1, 2008
    535
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    Location:
    Dana Point, CA
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    Wife commutes 50 mi round trip in ours. Averages about 49 with LRE tires 10psi over manuf. spec.
     
  8. CR94

    CR94 Senior Member

    Joined:
    Dec 2, 2014
    2,642
    1,133
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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
    1
    1
    0
    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.
     
    Danny3xd () likes this.
  10. jadd806

    jadd806 Member

    Joined:
    Dec 5, 2015
    41
    34
    0
    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
     
    RMB, frodoz737 and Raytheeagle like this.
  11. Vman455

    Vman455 Senior Member

    Joined:
    Feb 8, 2014
    534
    551
    13
    Location:
    The Middle
    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 () Member

    Joined:
    Sep 30, 2018
    84
    37
    0
    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.
  13. Tekken

    Tekken Member

    Joined:
    Jul 9, 2019
    250
    74
    0
    Location:
    Los Angeles, California
    Vehicle:
    2013 Prius
    Model:
    Two
    My first tank of gas used up since bought this 2013 Prius about 3wks ago. Display showed 52.2mpg on 502.4mi on Trip A and No Gas tank bar. I'm assuming it has about 1gallon left in the tank.

    20190808_165240.jpg

    All long term owners here filled up with 87 or 92 gas?
     
  14. NewHybridOwner

    NewHybridOwner Active Member

    Joined:
    Nov 21, 2018
    607
    278
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    Location:
    W. Michigan
    Vehicle:
    2015 Prius
    Model:
    Four
    We've only ever used 87 octane Top Tier gas -- BP, Mobil, Costco, and one tank of Marathon.
     
  15. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,481
    38,108
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Our 2010's mpg has been "fairly" steady. Kinda stumbled outa the gate this spring, due to new tires I suspect. Is picking up again, just wait till next fill up, lol. Only 83K kms (~50K miles) on it though.

    upload_2019-8-9_11-19-16.png
     
  16. frodoz737

    frodoz737 Top Wrench

    Joined:
    Aug 26, 2010
    4,297
    2,347
    33
    Location:
    Texas
    Vehicle:
    2015 Prius
    Model:
    Four
    Previous 2010 and current 2015. Best was 61.9 mpg long trip @60 mph flat road, worst 27 mpg long trip @65 mph towing medium weight trailer with hills. Both...about 42 mpg lifetime...driving normal. YMMV...but they both beat everything else without a plug. ;)
     
  17. CR94

    CR94 Senior Member

    Joined:
    Dec 2, 2014
    2,642
    1,133
    0
    Location:
    Northwestern S.C.
    Vehicle:
    2011 Prius
    Model:
    Two
    Average for
    2015: 58.0
    2016: 58.2
    2017: 59.7
    2018: 59.9
    2019: 60.0 so far

    However, tires must be replaced soon.
     
  18. bettergolf

    bettergolf Active Member

    Joined:
    Jan 8, 2019
    403
    331
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    Location:
    Sanford NC
    Vehicle:
    2015 Prius
    Model:
    Two
    after 2 years and 25k miles (50k on the car now) on my 2015 I average 53 in warm weather and 48.5 in winter. Tire pressures all at 39, no special tires, just all seasons not the best but middle of the range tires, buy the cheapest gas (87 octane) I don't care what brand, name brand or brand x. I do pay attention as I'm driving but won't go so slow that I irritate other drivers......I keep it under 72 at all times and try to take off smoothly if not slowly. I notice that if I'm in a hurry on a 35-65 mile trip it'll be 47 mpg (on the dash) and if i'm not in a hurry on that same trip it'll be 10 better.
     
  19. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    6,103
    4,032
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    This was my last & best tank w/AC on :cry:. 125K miles w/15,000mi OCI, thanks to non OEM and Mobil 1 oil & filters.

    IMG_2423.JPG
     
  20. Tha_Ape

    Tha_Ape Active Member

    Joined:
    Apr 9, 2019
    271
    161
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    Location:
    Washington, DC
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Advanced
    Ive had my 2010 for almost a decade. Best mpg was 59, now I get 45. It might be that I drive it more aggressively (if that's even a thing in a Prius), when I first got it, I was trying to maximize mpgs, then started driving it "normally".