To buy or not to buy a 2nd gen Prius... Fuel economy?

Discussion in 'Gen 2 Prius Fuel Economy' started by Robert_Ireland, Jan 4, 2020.

  1. Robert_Ireland

    Robert_Ireland New Member

    Joined:
    Jan 4, 2020
    3
    2
    0
    Location:
    Carrigrohane, Cork
    Vehicle:
    2004 Prius
    Model:
    II
    New on the forum and considering buying a gen2 Prius.

    I will soon be making seriously more commuter miles and am therefore orientating myself on a 'new' car to do these miles. My main concern is fuel economy, comfort comes second.

    I will be doing 120 miles per day for 3 days a week, hence going up to 360 miles. I will be driving from rural Ireland up to Cork city, meaning long stretches with speeds between 40 and 60 mp/h, a bit of uphill and a bit of downhill.

    Can anybody estimate what sort of fuel economy I can expect with a 2nd gen Prius, anywhere from 2004 till 2008 (this is as far as the budget will stretch)?

    I realize that I can also drive a Peugeot 107/Citroen C1/Toyota Aygo or a Corsa 1.0 with good fuel economy and lower maintenance cost, mildly lower tax and insurance, but when I can get the same or better fuel economy from a Prius, I know what I would rather be driving :)

    Any tips or links to interesting pages are welcome and much appreciated!
     
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    88,107
    39,296
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    welcome!

    that should get you 50 mpg, in a well tuned vehicle
     
  3. Robert_Ireland

    Robert_Ireland New Member

    Joined:
    Jan 4, 2020
    3
    2
    0
    Location:
    Carrigrohane, Cork
    Vehicle:
    2004 Prius
    Model:
    II
    Thanks! I realise that there are virtually no guarantees when buying an older, second hand car, it will be a risk no matter what. 50 Mpg sounds acceptable enough for me, after all, a bit of comfort is nice when spending so much time in a car and the car can of course be used for purposes other than commuting as well :)
     
    bisco likes this.
  4. ydpplqbd

    ydpplqbd Member

    Joined:
    Aug 1, 2019
    335
    142
    0
    Location:
    NJ
    Vehicle:
    2006 Prius
    Model:
    Three
    My 2006 Prius gets 46 to 48 mpg (real world gas mileage - mix of local and interstate) in winter here in the northeast US. My mileage has improved since purchase. I attribute mpg increases in my Prius to the following: i.) new air filter, ii.) new spark plugs, iii.) oil catch can and new PCV valve, and iv.) my own better knowledge on how to drive the Prius.

    Make sure to "test" the HV battery before purchase. The HV battery test (this test is often referred to on this site but I do not know the test's origins) goes something like this:
    i.) reset MFD mpg calculations at beginning of this test (IOW MFD should now show 0 miles and 0.0 mpg at beginning of test).
    ii.) drive Prius on as flat a road as possible at 60mph using cruise control with no other electrical accessories (turn off fan, radio, lights) for three to four miles, and
    iii.) at the end of the test of three to four miles note the calculated mpg.

    If I have not stated the test correctly or accurately then please jump in and provide correction.

    The noted mpg is an indication of HV battery health. My understanding is as follows regarding mpg noted for Gen2:

    >51mpg: Prius is operating as if it is well maintained and has a brand new battery

    50mpg: Prius is well maintained with a very good used battery

    48mpg: Prius runs well with an adequate used battery

    <40mpg Prius likely has a failed battery

    Make sure that no Check Engine Light (AKA CEL) is on before the test. As a CEL will often cause diminished gas mileage and therefore affect the above results (despite the CEL often not being battery related it will often affect mpg - think misfire or bad catalyst for examples).
     
  5. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    4,480
    2,400
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2006 Prius
    The only 3 things I will add is, before conducting the test:
    • Check tire pressures are 33 PSI Rear and 35 PSI Front.
    • The test should be conducted after the car has been driven for 15 - 20 minutes and is fully warmed-up and in stage 4. See the link in my signature Hybrid Warm up: 5 modes of Prius Operation..
    • If you have cruise control, use it.
    I would put this as number 1 and my number 2 would be check tire pressures are 33 PSI Rear and 35 PSI Front.

    The time of year makes a big difference. If the outside air temperature is 11ºC or less you will not get as good economy as it is above. The best economy is gained at 22 - 25ºC

    11ºC = ~52ºF
    22ºC = ~72ºF
    25ºC = 77ºF
     
    #5 dolj, Jan 5, 2020
    Last edited: Jan 6, 2020
    ydpplqbd likes this.
  6. scona

    scona Active Member

    Joined:
    Dec 10, 2013
    191
    190
    0
    Location:
    Courtenay, BC, Canada
    Vehicle:
    2013 Prius v wagon
    Model:
    N/A
    A 12 to 15-year-old Prius is close to needing a High Voltage battery replacement. If you can find one that has had the HV battery replaced
    that is worth looking at. If not, any fuel savings probably disappear when the battery needs to be changed.
     
  7. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

    Joined:
    May 12, 2018
    3,455
    3,406
    1
    Location:
    Pennsylvania
    Vehicle:
    2018 Prius c
    Model:
    Two
    An older Prius is definitely going to cost more to operate than the Aygo/Corsa or others listed. It's also a nicer car, I can see why you want it.
     
    scona likes this.
  8. Robert_Ireland

    Robert_Ireland New Member

    Joined:
    Jan 4, 2020
    3
    2
    0
    Location:
    Carrigrohane, Cork
    Vehicle:
    2004 Prius
    Model:
    II
    Thanks all for the extra information, much appreciated! It is something to take into consideration.

    I am pretty much torn still between the two, unfortunately there is no Prius for sale in the area for else I would take it for a spin to see how it drives. Not in a hurry yet, I have a car to do the miles when the time gets there, but this is far from fuel efficient :)

    Oh yeah, it is correct that the battery can be reconditioned? This is what I find online...
     
    #8 Robert_Ireland, Jan 7, 2020
    Last edited: Jan 7, 2020
    bisco likes this.
  9. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

    Joined:
    May 12, 2018
    3,455
    3,406
    1
    Location:
    Pennsylvania
    Vehicle:
    2018 Prius c
    Model:
    Two
    Yes. It's rather time-consuming, and you have to start doing it before it's too late, and even when you do it all properly the battery will need to be replaced.

    Get one with a known bad battery, get it for a low price, put a brand new Toyota battery in there and enjoy a decade of top performance. Costs less & drives better in the end.
     
  10. lexidium

    lexidium Junior Member

    Joined:
    Nov 19, 2015
    62
    24
    0
    Location:
    manchester
    Vehicle:
    2008 Prius
    Model:
    N/A
    The main thing is to learn how to drive a Prius in the correct way in order to gain the maximum fuel efficiency.
    Lots of articles on the internet about it for you to look up.
    Don't drive it how you would a normal petrol car.
    Also, as was said earlier, keep the tyre pressures correct as that certainly helps.
     
  11. Moving Right Along

    Moving Right Along Active Member

    Joined:
    Dec 29, 2016
    480
    392
    0
    Location:
    USA
    Vehicle:
    2009 Prius
    Model:
    N/A
    Average miles per gallon in gen 2 Prii are 42-44 mpg, according to Fuelly. Mine gets roughly 45 mpg.
     
  12. lexidium

    lexidium Junior Member

    Joined:
    Nov 19, 2015
    62
    24
    0
    Location:
    manchester
    Vehicle:
    2008 Prius
    Model:
    N/A
    A gallon here (UK) is equal to about 1.2 gallons in US
    My average over the week is about 58-60
     
    bisco likes this.
  13. Classic Car Guy

    Joined:
    Dec 23, 2018
    176
    67
    0
    Location:
    Oregon
    Vehicle:
    2007 Prius
    Model:
    II
    That's about right what I get on the city.
    Last year my average was 45.7 MPG w/ a lot of freeway driving 65 miles a day using 195 / 65 / 15 tire.
    Now its 44 on city stop and go driving using the standard 185 / 65 /15 tires.
    But I don't pump my tires more than 37 psi just for personal reasons. But I heard there's a lot of people put more air and they get better mileage. Either or anything above 32 mpg is already an excellent contribution to your wallet and the world crisis.
     
    #13 Classic Car Guy, Jan 8, 2020
    Last edited: Jan 8, 2020
  14. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    4,480
    2,400
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2006 Prius
    You will get exponentially less benefit going higher than 37 PSI.
    Your "better" MPG on the 195/65/15 was more than likely not real, but largely due to the slightly larger diameter. The correct proportion for the 195 mm tire is 195/60/15.
     
  15. roccostud

    roccostud New Member

    Joined:
    Feb 9, 2020
    13
    12
    0
    Location:
    Seattle
    Vehicle:
    2006 Prius
    Model:
    ----USA----
    depending on age of the car and time of year it varies. i get between 40-50mpg ( in the usa ) my daily average speed is maybe 35-45mph
     
Loading...