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Console vs actual MPG

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by Jerry Liebler, Mar 12, 2017.

  1. Jerry Liebler

    Jerry Liebler Member

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    In my previous PIP, 2012 MY, I routinely observed that the trip MPG was about 5% greater than actual. The replacement PIP, 2013 MY is showing almost perfect agreement between trip MPG and fill-up calculated MPG. I looked through the spread sheet data and note that the correspondence between "console MPG" and "raw MPG" varies widely. Does anyone have an explanation?
     
    #1 Jerry Liebler, Mar 12, 2017
  2. bisco

    bisco cookie crumbler

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    how many tanks have you recorded? every once in awhile, someone claims they show little difference. it could be the replacement tire diameter.
     
    #2 bisco, Mar 12, 2017
  3. Jerry Liebler

    Jerry Liebler Member

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    Kind of a false alarm as my last tank was real close. But if I average the deviation over the last 5 tanks it is about 3% still better than what I saw with the 2012. It shouldn't be the tires, based on the specs at least, since the new tires, according to tire rack, have the same 833rev/mile as the OEM tires on the old car. However, they are new and therefore full size while the 2012 had half worn tires when it was killed. A factor might be the slight diameter increase that running 51PSI, sidewall rating, creates.
     
    #3 Jerry Liebler, Mar 12, 2017
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  4. jerrymildred

    jerrymildred Senior Member

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    There are probably variations in the fuel meters' accuracy from unit to unit as well.
     
    #4 jerrymildred, Mar 13, 2017
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  5. Sam Spade

    Sam Spade Senior Member

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    That might be a factor in shaking your teeth loose too. And pounding the suspension to death. Seriously, NOT a good idea.

    And......to clarify the original question: Are you taking about wide variations in the calculated MPG for individual fuel fillings ??
    A major factor in that is the automatic shutoff on the pump nozzle.
    Another is variations in the driving conditions from one tank to another.
     
    #5 Sam Spade, Mar 13, 2017
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