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Why Did the EPA mpg for the Prius C Go Down?

Discussion in 'Prius c Main Forum' started by Brad K, Mar 27, 2019.

  1. Brad K

    Brad K Member

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    The Prius C mpg used to be 53 city / 46 hwy, combined 50 mpg

    now its listed as 48 city / 43 highway, combined 46 mpg
     
    #1 Brad K, Mar 27, 2019
  2. bisco

    bisco cookie crumbler

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    how long ago? the epa have changed their test protocol several times
     
    #2 bisco, Mar 27, 2019
  3. Deleted member 111882

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    EPA 2016 standards, primarily

    Also I will note that there is a secondary effect in that since 2012, Prius c got a bit wider and a bit taller, and marginally heavier, so, more total friction, but not by much.
     
    #3 Deleted member 111882, Mar 27, 2019
  4. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    They haven't changed the car enough to account for it, so it must be the test methodology. That has changed several times over the years though I haven't kept up with the latest.

    Your right foot will change it more.

    I can get anywhere from 30 to 70 out of ours by changing driving style, but honestly it's almost always 45-50 when we just buckle up & go without thinking about it.
     
    #4 Leadfoot J. McCoalroller, Mar 27, 2019
  5. Tideland Prius

    Tideland Prius Moderator of the North
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    The EPA has changed their methods/requirements. The latest one was 2016 for the 2017 MY - I think it had to do with the roll down test. (let the car roll in neutral on a flat surface at some speed and see how far it goes before the speed drops to a certain threshold).

    The 2017 update is also why the 2017 and 2016 Accord Hybrid have the same EPA numbers even though the 2017 was improved.
     
    #5 Tideland Prius, Mar 27, 2019
  6. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    Aren't all goalposts mounted on casters these days?
     
    #6 Leadfoot J. McCoalroller, Mar 27, 2019
  7. Brad K

    Brad K Member

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    not sure when it changed but I noticed it recently on the new Prius Cs for sale. I would not have considered it over the regular prius if it had been that in 2014. I average 50 though, but am somewhat disappointed in the mpgs at 75-80 mpg (42-43)
     
    #7 Brad K, Mar 28, 2019
    ztanos likes this.
  8. bisco

    bisco cookie crumbler

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    agreed. unless you prefer the smaller size, c just doesn't cut it mpg wise.
     
    #8 bisco, Mar 28, 2019
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