Mileage?!!!

Discussion in 'Gen 3 Prius Main Forum' started by David Beale, May 26, 2015.

  1. David Beale

    David Beale Senior Member

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    I just don't know what to make of this. When you have the nav. screen in the Canadian "Technology Package" every time you shut down it displays how you did mileage wise and the cost of the fuel you used. This morning, after a 10 km drive I got 2.38 l/100 km. That's just silly. 100 MPG US, 119 MPG imperial. The sky IS still blue. I'm pretty sure I'm not dreaming? Pearl S IS NOT a PIP!

    I guess I'll just "smile and be happy"?
     
  2. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

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    Starting with a cold engine? That is nuts. The only Toyota info I really pay attention to is the odometer, at every fill up. Just for laughs I record what Toyo tells me, and it's a very consistent 7.5% optimistic. But yours has reached a new low in misinformation.
     
  3. ExMachina08

    ExMachina08 Junior Member

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    My guess is that you drove on some slow roads around 45 mph (72kmh) and stayed almost entirely on battery. Its not unusual to get 99.9 mpg over short distances if you had a full traction battery and drive slowly.
     
  4. bisco

    bisco cookie crumbler

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    10km is a lot further than the battery will go, was it downhill?
     
  5. fuzzy1

    fuzzy1 Senior Member

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    ... especially if the trip segment also includes elevation loss.
     
  6. DoubleDAZ

    DoubleDAZ Senior Member

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    I haven't gotten 100, but I have gotten 72 over a 7.5 mile trip from the library. Some of it is somewhat downhill and there is a 1/2-3/4 mile segment that tends to run in EV mode. Unfortunately, such short trips mean almost nothing in the big scheme of things.
     
  7. fuzzy1

    fuzzy1 Senior Member

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    I've met or beat 72 on numerous round trip commutes (two cold starts, several thousand feet of gross elevation change but zero net change) of 36 miles. Also did these, first was a round trip very shortly after getting the car, second was a one-way:
    [​IMG] [​IMG]

    But others have done far better in the right conditions. Don't we have a 100+ MPG thread, for whole tanks or extended distances, somewhere here in PC?

    The hard core Japanese hypermilers surpassed 100 mpg for whole tanks long ago. As I posted to another thread:
    Another World Record 1,460 miles/tank | PriusChat
    1,562 miles, New World Record with a single tank | PriusChat
    New World Record - 1619 miles per tank | PriusChat
    New World Record - 1680 miles per tank | PriusChat
    New World Record Challenge: over 50km/L(117mpg) tank | PriusChat
    That final one went 1889.4miles, over 3000 kilometers, with a final result of 118.6 mpg.

    So OP's 100+ MPG short trip is not necessarily silly at all, it could be the realistic convergence of skill and the right conditions.
     
  8. David Beale

    David Beale Senior Member

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    No hills, and on that part of the trip the engine was warm, as it only sat for 10 min or so while I bought groceries. Ambient is currently "warm" for Edmonton, peak temps from 25 to 30C. It was on battery for a while, but the meter still indicates about 60% as per normal. Current tank average is 4.4. That was the last leg of a 25km trip with three stops.

    That's the lowest number I've ever seen Pearl S show. Still below 20,000 km so still "breaking in".
     
  9. David Beale

    David Beale Senior Member

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    Of course today I experienced the other extreme. Moved the car out of the garage so I had more room to work. "EV mode not available". When I moved it back I noticed "77.1 l/100 km". ;)
     
  10. walter Lee

    walter Lee Hypermiling Padawan

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    I guess so. Because of the stop engine idle tech - Once you get a Prius started a certain speed you could just coast downhill for 10 km without turning on its engine - all you need a smooth road surface with a fairly straight road direction an elevation/attitude drop between your starting point and end point, reasonably warm driving temperature, and the wind behind your back..To eliminate the cost of the warm up you set the Prius trip odemeter to zero after you warm up the car.... the most accurate way to determine the real fuel efficiency is to divide the miles driven between the gallons use to fill up the gas tank after the first automatic fuel pump shutoff click

    You can also use a Scangauge II AVG meter which is pretty accurate.

    Today
    going downhill my regular 15.8 miles it estimated I was getting 79.8 mpg
    going uphill my regular 15.8 miles it estimated I was getting 60.1 mpg
    so my average is about 69 mpg today...
    The Prius says my average fuel efficiency for the last 290 miles is 67 mpg but it is usually about 3 mpg optimistic. At 64 mpg - I think I can do a 700 mile/tank..

    my commute elevation change is from about 480 feet to about 300 feet
     
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