What's a realistic fuel economy for a Gen 4?

Discussion in 'Gen 4 Prius Fuel Economy' started by George W, Apr 19, 2026 at 9:34 PM.

  1. George W

    George W Senior Member

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    I just purchased a 2019 Prius 2 this past week. The first full tank is indicating 55 to 56 miles per gallon in mixed driving, with a total expected range of about 490 MI. Since I'm a Gen 4 newbie, I'm curious if this is typical for a car with 140K. Thank you.
     
  2. Mendel Leisk

    Mendel Leisk MMX GEN III

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    Google: fuelly 2019 Prius.
     
  3. notspam3

    notspam3 Member

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    Forget google AI slop, here's real world fuel economy and you can search by sub-model, year and compare your location

    Fuelly.com
    https://www.fuelly.com/car/toyota/prius

    The people who have uploaded lots of data regularly tend to have more reliable stats.

    If you are flat ground in a warm climate you will tend to get better results than cold climate with hills and a lead foot.

    For 2019 you are looking on average 4.5-5.0 L/100km
     
  4. Mendel Leisk

    Mendel Leisk MMX GEN III

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    Dividing 235.2 by either litres per 100 kms or mpg (US) converts it to the other. For example, converting 5 litres per 100 kms:

    235.2/5=47.04.

    kinda cool: at least on my iPhone with Safari, typing the above, as soon as I type the equal sign it auto-completes the outcome.
     
  5. BiomedO1

    BiomedO1 Senior Member

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    That's kind of a tricky question to answer, but I believe the EPA states 52 mpg combined.

    The variables that effect this is driver's input (lead-foot); terrain (hills, mountain), weather (cold, sunny), and general car's shape (under carriage air diverters, brakes dragging, junk in the trunk). All these little things add and subtract to this car's average mpg, vs an all gas car. Most of what I listed above wouldn't affect gasoline cars as much. Even with all the negatives; that car still gets better mpg than most other cars on the road today. I do know that you'll take a big hit in mpg if you normally travel above 70 mph. People in Montana and Idaho report mpgs below 48 mpg averaging 80+ mph. Some of that may also be terrain related.

    Hope this helps.....

    FWIW; you should be looking for any deviations from YOUR normal mpg. That's the indicator that something's wrong with the car. If you loan the car out to someone else; that's going to punch a hole in your "normal" mpg.
     
    #5 BiomedO1, Apr 20, 2026 at 12:27 PM
    Last edited: Apr 20, 2026 at 12:39 PM
  6. ColoradoBoo

    ColoradoBoo Senior Member

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    Yep, that sounds nominal. We have a 2017 and 2019 and can range from 44 mpg (driving like an F1 driver on the interstate) to 65 mpg using the pulse-and-glide method.

    MPGs will go down during the hotter months when you run the A/C, which is normal....electric A/C compressor can suck quite a bit of sparks from the system which lowers MPGs.

    Has the car been maintained? If transmission hasn't been serviced, make sure you get that done....it's just a drain-and-fill so not an expensive job. (Same for engine and traction coolants, will need changing if they didn't do that.)
     
  7. bisco

    bisco cookie crumbler

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    that is very good mileage! did you calculate at the pump? the dash readout is optimistic
     
  8. ColoradoBoo

    ColoradoBoo Senior Member

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    I only trust the real data from gallons at the pump when refilling as the car isn't very accurate in her estimates!! (I use my "Trip A" for this when I'm tracking MPGs.)
     
  9. Mendel Leisk

    Mendel Leisk MMX GEN III

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    I reset Trip A at each fillup, note the kilometers, but also note the odometer kilometers. The latter is my bullet-proof go-to, the former just for back-up, and "optimistic" mpg feedback during the tank. I use an Excel spreadsheet, the odometer values are entered, the trip values, calculated, subtracting previous odo from latest, and compared to what I noted at gas station, for a check.

    upload_2026-4-20_12-13-20.png
     
    #9 Mendel Leisk, Apr 20, 2026 at 3:13 PM
    Last edited: Apr 20, 2026 at 3:19 PM