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Fun with MPG - different each way

Discussion in 'Gen 3 Prius Fuel Economy' started by PriusNeckBeard, Apr 3, 2017.

  1. PriusNeckBeard

    PriusNeckBeard Active Member

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    Just having a little fun, here... :)

    last night, I drove out to get ice cream
    There's a lot of coasting, opportunities to go into neutral, etc
    Anyway,
    On the way there: 86 mpg
    On the way back: 46 mpg

    Lol
     
    #1 PriusNeckBeard, Apr 3, 2017
  2. Mendel Leisk

    Mendel Leisk Senior Member

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    Were you eating the cone on the way back...
     
    #2 Mendel Leisk, Apr 3, 2017
    fuzzy1 likes this.
  3. PriusNeckBeard

    PriusNeckBeard Active Member

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    No, but if I only drive there and never drive back, I'll save a lot of gas and eat a lot of awesome ice cream !
     
    #3 PriusNeckBeard, Apr 7, 2017
  4. fuzzy1

    fuzzy1 Senior Member

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    What is the elevation difference between the two ends of this trip?
     
    #4 fuzzy1, Apr 7, 2017
  5. PriusNeckBeard

    PriusNeckBeard Active Member

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    261 feet !
     
    #5 PriusNeckBeard, Apr 9, 2017
  6. fuzzy1

    fuzzy1 Senior Member

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    Next, what is the one-way distance?

    I have a rule of thumb for elevation change, and can compute to check your trip against this simple (or simplistic) rule.

    P.S. My simple rule, excluding engine warm-up issues, points to a one-way trip of 2.6 miles, give or take 15%-ish. However, this assumes that the engine was already warmed up before the trip. If it wasn't -- and seems likely that it wasn't -- then the calculation will be off.
     
    #6 fuzzy1, Apr 10, 2017
    Last edited: Apr 10, 2017
  7. fuzzy1

    fuzzy1 Senior Member

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    .
     
    #7 fuzzy1, Apr 10, 2017
  8. PriusNeckBeard

    PriusNeckBeard Active Member

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    Fuzzy1!!!
    It was 2.5 miles !!!
    Amazing! Great job.

    Warm up wasn't much of an issue - I'm guessing it was 50 % decline.

    Once again, great job !
     
    #8 PriusNeckBeard, Apr 11, 2017
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