800 mile per tank challenge

Discussion in 'Gen 4 Prius Fuel Economy' started by cproaudio, Jan 28, 2016.

  1. krousdb

    krousdb NX-74205

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    I am no expert, but from what I understand, Octane has nothing to do with energy content. There should be no difference between 87 octane and 92 octane. The 92 octane can support much higher compression ratios however.
     
  2. wjtracy

    wjtracy Senior Member

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    That's absoluely correct, however, one way to add octane is to add higher energy aromatics. So you could have better energy ...just not guaranteed.
     
  3. krousdb

    krousdb NX-74205

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    All righty then. How do I get my hands on some high quality aromatics? Sounds like they should be illegal.:p
     
  4. wjtracy

    wjtracy Senior Member

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    Pretty expensive these days I thought about fiddling but expensive. Toluene/Xylene typical. I think STP.
    92 octane E0 is the best shot at it
     
    #24 wjtracy, Feb 26, 2016
    Last edited: Feb 26, 2016
  5. krousdb

    krousdb NX-74205

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    Yesterday I posted my first tank on Fuelly. Then I looked under 2016 Priuss and didn't see my entry listed. I went back today and got the same result. Then I read the comment above the distribution chart:

    "Below you can see a distribution of the fuel-ups with 1 outliers (5.88%) removed."

    So now I am an outlier! I can understand the need to do that after only one tank, but maybe after a few tanks Fuelly will take me seriously.
     
  6. thunderstruck

    thunderstruck Active Member

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    Tell them and point out your total mileage. If it was a 100 mile fillup that could be explained by a pump difference, but a full tank is an entirely different story.
     
  7. telmo744

    telmo744 HSD fanatic

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    Statistic maniacs. I've seen that a couple of years ago with Spritmonitor rejecting a tank of 1.5l/100km with a Prius PHV. It has changed since, because of complaints.
     
  8. wjtracy

    wjtracy Senior Member

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    ...bummer!
     
  9. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Patience my friend. The grinding of bureaucracy is slow but inevitable.

    Bob Wilson
     
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  10. krousdb

    krousdb NX-74205

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    Indicated:
    873.4 miles indicated/11.438 gallons pumped = 76.36MPG
    81.8/76.36 = 7.1% error (Not corrected for Odometer error)

    Corrected (with Odometer error of -1.9% (measured via google maps on 3 occasions):
    873.4*1.019 = 890.0 actual miles/11.438 gallons pumped = 77.81 MPG Corrected
    81.8/77.81 = 5.1% total error.

    Fuel warning came on at 794 miles.
    Range went to zero at 844 miles.

    Driving time was 25 hours and 45 minutes, 34.56 MPH average speed
    56% in EV mode. Spring has sprung in Raleigh.

    IMG_0227.JPG
     
    #30 krousdb, Mar 11, 2016
    Last edited: Mar 11, 2016
  11. cjecpa

    cjecpa Member

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    Pretty amazing I would like to see what the highest miles for one tank is for nonstop highway trip. I drive 24 hours straight to Dallas every year.
     
  12. bwilson4web

    bwilson4web BMW i3 and Model 3

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    The primary determinant is highway speed. We are getting enough information about the Prius that we may soon have an effective trip planner. From what we're seeing so far, take these numbers and add 10% to get a rough, rule of thumb . . . for now:
    [​IMG]
    So if your speed is say 80 mph, adding 10% would be:
    • 40 MPG * 1.10 ~= 44 MPG
    • 44 MPG * 11 gallons ~= 484 miles
    You'd be looking at about 500 miles without reserve.

    Bob Wilson
     
  13. cjecpa

    cjecpa Member

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    Thanks figuring 75mph which will be on some long stretches but overall average is closer to 63 mph so around 50 mpg so probably closer to 500 miles between fill ups. Figuring I am not going to let it get to the warning light. Still better then my 300 miles between fill ups.
     
  14. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Remember the car burns the gas so use its cruise speed which should always be higher than elapsed speed and even what shows up on a dash trip meter . . . unless you reset it upon reaching cruising speed.

    Now the Gen-4 may be too new to show up in rental fleets but I'm sure the Gen-3 is available. You might consider renting one long enough to find out if it works for you . . . knowing the Gen-4 is a much nicer ride (not that I have any direct experience, yet.)

    GOOD LUCK!
    Bob Wilson
     
  15. cjecpa

    cjecpa Member

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    Thanks. Looking for better gas mileage than my current vehicle. Once made the trip in a 2012 Honda Fit.
     
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  16. krousdb

    krousdb NX-74205

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    I will post details tomorrow.
    IMG_0258.JPG IMG_0272.JPG IMG_0271.JPG
     
    #36 krousdb, Apr 4, 2016
    Last edited: Apr 5, 2016
  17. fuzzy1

    fuzzy1 Senior Member

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    A 1000 mile tank already? That didn't take long. Summer hasn't even arrived yet.
     
  18. cproaudio

    cproaudio Speedlock Overrider

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    Actually now is the best time to get highest miles per tank. Any later then it'll be too hard to achieve this kind of number due to using AC.
     
  19. fuzzy1

    fuzzy1 Senior Member

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    Maybe for you. With snow and slush on Stevens Pass today, and a winter traction tire advisory, our AC season is still a fair way off.
     
  20. vince22

    vince22 Active Member

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