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Getting 75+ MPG while going 42-45 MPH

Discussion in 'Gen 3 Prius Fuel Economy' started by ElectronFlux, Nov 20, 2012.

  1. ElectronFlux

    ElectronFlux Junior Member

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    This morning, I noticed that my instant MPG would shoot up to 75+ mpg and stay there with little slowing if I held the gas pedal down in a narrow "sweet spot" about 1/4 to 1/2 inch left of the midpoint on the HSD indicator at around 42-45 MPH. Has anyone else noticed this? I was trying to do pulse-and-glide, but I thought glide meant keeping the indicator just past the CHG area. My apologies if this is already covered in another thread.
     
    #1 ElectronFlux, Nov 20, 2012
  2. markabele

    markabele owner of PiP, then Leaf, then Model 3

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    I use this technique quite a bit while using cruise control going down hills. I feather the throttle until the iMPG is 75-100. It definitely is much more efficient than simply letting cruise control do its own thing.

    What you are referring to is not a true glide.
     
    #2 markabele, Nov 20, 2012
  3. Selzier

    Selzier Whee!

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    I do this all the time on busy roads rather than P&G to maximize my MPG's while minimizing how mad I'm making people on the road. I can maintain anything between 39-45 at 70+ I notice the "sweetest" spot is at about 42 mph on flat road I can normally score 85+. I'll agree with markebele, though, this is no true glide and you are consuming fuel.
     
    #3 Selzier, Nov 25, 2012
  4. bwilson4web

    bwilson4web BMW i3 and Model 3

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    My tests involve averaging both directions of a 10 mile, back-to-back, using the same start/stop points on each end. This minimizes wind, temperature, and elevation effects:

    [​IMG]

    So what distances are your metrics taken? Both directions? Same start/stop points? Temperatures?

    Thanks,
    Bob Wilson
     
    #4 bwilson4web, Nov 25, 2012
    F8L and cwerdna like this.
  5. ElectronFlux

    ElectronFlux Junior Member

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    Bob,

    What I noticed wasn't sustained for very long, about 1/2 a mile or so because I was in a flat area between some small hills. I wasn't specifically testing for it, just noticed it and wanted to find out if it was a fluke or not. Judging from your graph, it appears that the Prius can get that kind of MPG in that speed range. Thanks for posting the graph.
     
    #5 ElectronFlux, Nov 26, 2012
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