Full tank range difference

Discussion in 'Prius v Fuel Economy' started by pierced, Mar 11, 2021.

  1. fuzzy1

    fuzzy1 Senior Member

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    What fuel consumption did the trip meter display for that 136 km? I'd take that as more meaningful than the 2 liters, and chalk the later up to some undetermined variation in fuel pump cutoff point. Those variations should average out over multiple refills and larger fuel quantities.
     
  2. pierced

    pierced Junior Member

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    Started w/ 780kms range and ended up with 651kms left when I arrived at the gas station. Consumed 129kms w/ full AC vice versa out of the possible 136kms that reads on the odometer.
     
  3. fuzzy1

    fuzzy1 Senior Member

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    The Range or Distance-To-Empty numbers are a forecast of future results based upon recent but always-changing history, so are much less accurate or useful than many drivers expect.

    I'm more interested in what fuel consumption (e.g. MPG or km/liter or liters/100km) was measured and displayed on a Trip meter for those 136 km, provided that you reset a Trip meter at the start of that trip. If you did not reset a Trip meter at the start, then this information was lost.
     
  4. pierced

    pierced Junior Member

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    Oh! I´m sorry! My avg was 4.6l/100kms. My bad..
     
  5. fuzzy1

    fuzzy1 Senior Member

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    So that should have been about 6.2 liters consumed, vs just 2 liters refilled. That is quite a difference, but I would still guess that it was most likely something related to inconsistent fuel pump shutoff.
     
  6. pierced

    pierced Junior Member

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    Is it a cause for concern?
     
  7. pierced

    pierced Junior Member

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    I went back to the station and filled in again. Now, I was able to fill in 4.6L. However, mileage didn’t change. Driving range is now down to 647kms. So, maybe it’s really full already?
     
  8. fuzzy1

    fuzzy1 Senior Member

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    Not for anything I can think of now.
    This suggests that the 2L fillup was somehow an underfill, and that the surrounding tries were not overfills.
     
  9. pierced

    pierced Junior Member

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    okidoki. Thanks a lot for your your help. Highly appreciated.
     
  10. Max Taiwan

    Max Taiwan Active Member

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    Just a side note when it comes to filling, go slow for the last 10 liters to allow trapped air to come out.
    With our 3rd tank up running on normal mode i estimate 750km+ before bingo on fuel, we should be able to push it over 800km before going on fumes.
    As we are expecting a baby soon I am going to gas up right at bingo fuel... need to be extra prepared.
    This round on normal mode we are getting 20.0 km/l on the computer, we will cross reference with the gas up and maybe do the Red Bullet upgrade after we get another full tank on normal mode.
     
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