2018 Prius Prime finally showing actual MPG?

Discussion in 'Prime Main Forum (2017-Current)' started by Darken, Apr 3, 2018.

  1. Darken

    Darken Active Member

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    Didn't see a thread on this so I thought I would make a post. On another board I've seen posts from a few 2018 owners that the MFD now shows MPG greater then the 2017's maxed 199.9. Can anyone who owns one verify if this is the case or not?

    If so what are the odds that they may update the 2017 version to get rid of the 199.9 MPG cap?
     

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  2. Prodigyplace

    Prodigyplace Senior Member

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    The odds are slim to none. The only reason I could think of would be if there was some other reason to update that part of the software and adding that feature made Toyota's software version maintenance easier & less expensive.

    I cannot think of any other way Toyota could profit from making such a change.
     
  3. john1701a

    john1701a Prius Guru

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    No profit opportunity, but still opportunity.

    You can have the FOB updated, upon request. I did for the "open all windows" feature.

    Toyota updated the buttons on the steering-wheel in the past, providing a software update just for driver convenience.
     
  4. Prodigyplace

    Prodigyplace Senior Member

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    I just looked at my Gen 4. I suspect it would need a different speedometer display, much like the early Gen 4 needed to switch to Km. there does not look like any space for a digit wider than 1.
     
  5. muleman

    muleman Junior Member

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    I want this. I have been pinned on 199.9 for a while.
     
    #5 muleman, Apr 4, 2018
    Last edited: Apr 4, 2018
  6. pineprius

    pineprius 15th Hole #4

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    I've been pinned on 199.9 per trip A on a tank of gas, so I just changed the ODO to total miles on car and voila 115.9 mpg for 4500 miles.
     
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  7. Travis64

    Travis64 Member

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    Who would buy a 18 when the 17 is the same car but so much cheaper
     
  8. Dudley1030

    Dudley1030 Active Member

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    I have a ScanGauge2 and it seems to show the actual MPG. So the computer may have the info but only displays up to 199.9.
     
  9. john1701a

    john1701a Prius Guru

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    Diminishing returns... there simply isn't much benefit of values over 200 MPG, especially when margin-of-error is considered.
     
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  10. Stever56

    Stever56 Junior Member

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  11. Tideland Prius

    Tideland Prius Moderator of the North
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    It also fluctuates quite a bit above 200mpg but the actual usage of fuel isn't that great.
     
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  12. Darken

    Darken Active Member

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    A valid point but it really depends on where you live. Out west I duobt there are many if any 2017's left, whereas here in the east you can have your pick of 2017's with any option or style you want. Made the 2017 choice a no brainer for me, but others may not have that option.
     
  13. JGC61

    JGC61 Member

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    Fill my tank every 500 miles.
    Last time I used 1.5 gallons of fuel.
    That's about 348 MPG.
     
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  14. alexcue

    alexcue Active Member

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    agree, the actual calculated has never been accurate on a Prius IMO.
     
  15. fneil

    fneil Member

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    I've never really understood why anyone cares about the >199 mpg readout. When you're driving mixed EV/gas miles, it's pretty much meaningless, as it doesn't factor in the $$$'s/carbon contributed by the EV/charging component.

    The only time my mpg readout means anything is when I'm running in pure HV mode. If I reset the tripmeter, and run in HV mode, I get a true mpg indication. But I often forget to switch back to HV from default EV mode after a stop, and then my mpg calculation is toast. I really wish the HV/EV mode selector was persistent.

    Which is why I don't bother running Fuelly stats with my Prime - meaningless...
     
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