1. Attachments are working again! Check out this thread for more details and to report any other bugs.

How much gas is left?

Discussion in 'Prime Main Forum (2017-2022)' started by PiPLosAngeles, Jan 29, 2019.

  1. PiPLosAngeles

    PiPLosAngeles Senior Member

    Joined:
    Nov 18, 2012
    1,550
    720
    0
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    Just in case anyone was curious, when your fuel gauge looks like this

    [​IMG]

    there's still 1.7 gallons left in the tank, according to the gas pump.
     
    Tideland Prius likes this.
  2. schja01

    schja01 One of very few in Chicagoland

    Joined:
    Apr 22, 2005
    1,765
    1,169
    0
    Location:
    Chicagoland
    Vehicle:
    2018 Prius
    Model:
    Prime Advanced
    How much is condensed moisture?
     
    eroeder likes this.
  3. PiPLosAngeles

    PiPLosAngeles Senior Member

    Joined:
    Nov 18, 2012
    1,550
    720
    0
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    Hopefully not 1.7 gallons. If so, by the time the car's a year old I'll only have water in the tank.
     
  4. Salamander_King

    Salamander_King Senior Member

    Joined:
    Nov 8, 2015
    10,985
    8,886
    0
    Location:
    New England
    Vehicle:
    Other Hybrid
    Model:
    N/A
    Yeah, when the empty gas light comes on, you still have more than 2 gallons left in the tank. I once drove an additional ~100 miles to the nearest gas station but still had almost a gal in the tank to spare. I hoped the car shows negative range on the display, so you know how far you drove after reaching ----miles on the range indicator.
    IMG_20170827_201336-COLLAGE.jpg
     
    #4 Salamander_King, Jan 29, 2019
    Last edited: Jan 29, 2019
  5. PiPLosAngeles

    PiPLosAngeles Senior Member

    Joined:
    Nov 18, 2012
    1,550
    720
    0
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    Thanks. This can be useful information for people who might feel the urge to panic shortly after the low fuel light comes on.
     
    SteveMucc and Salamander_King like this.
  6. schja01

    schja01 One of very few in Chicagoland

    Joined:
    Apr 22, 2005
    1,765
    1,169
    0
    Location:
    Chicagoland
    Vehicle:
    2018 Prius
    Model:
    Prime Advanced
    Low fuel light?
    What’s that?
    Maybe it’s my pilot mentality but I never let fuel get that low. Never.
     
    walterm, bamike, nology and 1 other person like this.
  7. SteveMucc

    SteveMucc Active Member

    Joined:
    Oct 3, 2017
    391
    268
    0
    Location:
    Kentucky
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    thanks, that's good to know. I've driven about 60 miles after it showed zero, not because I wanted too, but because I was driving through east bumm-f**k and it was around 1 in the morning and there was simply no gas stations open anywhere.

    thank god I wasn't driving a top-fuel dragster:
    How much fuel does a Top Fuel Dragster use? - Terry McMillen Racing

    it gets impressive around 14 seconds. burns up an entire Prius tank in about 2 seconds.

    But the real question... how much extra does a Tesla show? When it hits 0 are you screwed or does it keep a reserve for you?
     
  8. schja01

    schja01 One of very few in Chicagoland

    Joined:
    Apr 22, 2005
    1,765
    1,169
    0
    Location:
    Chicagoland
    Vehicle:
    2018 Prius
    Model:
    Prime Advanced
    The Saturn V probably does it in nano seconds.
    If it burned gasoline.
     
    #8 schja01, Jan 29, 2019
    Last edited: Jan 29, 2019
  9. smyles

    smyles Active Member

    Joined:
    Jan 1, 2019
    332
    229
    0
    Location:
    US
    Vehicle:
    2020 Prius Prime
    Model:
    XLE
    I recall reading 1st gen Volt tech notes, and they talked about how 0 was actually 50% remaining charge - it was done to preserve batteries, as we all remember how first Teslas often turned into bricks once discharged. Nowadays with batteries advancements I think much lower, I believein 20...30% range.
     
  10. PiPLosAngeles

    PiPLosAngeles Senior Member

    Joined:
    Nov 18, 2012
    1,550
    720
    0
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    I think it's general practice these days to limit charge/discharge to about 85% and 25% respectively. Battery life is greatly extended this way.

    I know Teslas have some sort of "reserve" because they activated additional range in Teslas in a hurricane evacuation area not long ago.
     
  11. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,686
    39,222
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I really think we should ban these threads, they're pointless.
     
    dcantat likes this.
  12. PiPLosAngeles

    PiPLosAngeles Senior Member

    Joined:
    Nov 18, 2012
    1,550
    720
    0
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    Why would anyone want to forcibly prevent other people from discussing anything? That seems so gestapo.
     
    benagi and Mendel Leisk like this.
  13. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,686
    39,222
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
  14. smyles

    smyles Active Member

    Joined:
    Jan 1, 2019
    332
    229
    0
    Location:
    US
    Vehicle:
    2020 Prius Prime
    Model:
    XLE
    I'm offended

    /crawls into safe space/
     
  15. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,686
    39,222
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
  16. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    17,557
    10,324
    90
    Location:
    Western Washington
    Vehicle:
    Other Hybrid
    Model:
    N/A
    First stage burned kerosene, is that close enough? One note indicates 15 tons per second.
     
  17. ed4271

    ed4271 Member

    Joined:
    Mar 4, 2017
    107
    64
    0
    Location:
    US
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    I 90 miles to get to my destination. Total miles left was 75. So I ran the the generator to charge the battery. So while I was driving at 75 miles I was putting my EV miles into the traction battery. Even though I lost some gas mileage I was able to put enough EV to get me home. Said I could be an option just that low fuel warning comes on and you don't have that much battery try using the charger. Oh I drove efficiently to get me home to a gas station.

    Posted via the PriusChat mobile app.
     
  18. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,686
    39,222
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Yeah I guess you're right, discuss away. :oops:
     
  19. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    17,557
    10,324
    90
    Location:
    Western Washington
    Vehicle:
    Other Hybrid
    Model:
    N/A
    Gas in HV should have been able to get you home too, without charging for later EV. It has some safety margin built in the to miles-to-empty display.

    Using gas to charge the battery for later EV ought not to extend your total available range. If anything, it typically ought to shorten available range slightly, absent special cases. Burning gas to charge the battery involves laundering that energy through more lossy engine conversion processes, vs driving the wheels directly.

    When Bob Wilson advocated doing this, it wasn't to extend range, but rather to give more solid warning that end-of-range was coming up shortly, to prompt the driver to make alternate arrangements before truly going dead. Lack of upcoming warning was one of his complaints about the Gen3. At least his Gen1 gave enough warning of impending fuel starvation to look for a wide spot to pull safely off the road, but Gen3 did not.
     
    ed4271 likes this.
  20. RonMc5

    RonMc5 Member

    Joined:
    Jul 10, 2017
    89
    73
    0
    Location:
    Santee
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Advanced
    Alas the gauge just looks digital. The car knows how much fuel it has burned, it just ain't gonna tell you! Pet peave, and not just Primes, Prii or even just Toyota. all gas gauges are not just wrong but terribly non-linear. The top seq stays full a bit long. the next 6 or 7 are pretty good. The last 2 or 3 go pretty quick! You can probably judge how much gas you have left when you have 3 segments left you have prably used 7/10 of you gas and do mental math from there. The DTE follows the gas gauge so you can count down for what it says when you have 3 segments. This only works if the there it is not so hot or cold you have the use the AC, or there are serious mountains to climd or where you are going is at a higher altitude.


    Posted via the PriusChat mobile app.