Help -10% Mileage Drop with New Tires!

Discussion in 'Prius v Fuel Economy' started by Tonydavid, Sep 16, 2018.

  1. kobear18

    kobear18 Junior Member

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    it looks like everybody is getting 10% reduced MPG on all those name brand tires. I got Bridgestone quiettrack for my 2010 prius and I got 43.5 now. I used to have 50.3 with my Goodyear Assurance for the past 4 years. I read that even the energy saver took a hit of MPG too. Do you think they all did that on purpose just to force all of us to switch to tesla? U think im joking and conspiracy theorist. I guess not because all I read on here are almost every1 is taking a hit on MPG with new tires.
     
  2. bisco

    bisco cookie crumbler

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    i have energy savers, no loss. no idea why
     
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  3. mikefocke

    mikefocke Prius v Three 2012, Avalon 2011

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    Different tire pressure? Tire surface smooths out as they run the first hundreds of miles.

    I saw no change that I noticed and I charted every fill up..
     
  4. Air_Boss

    Air_Boss Senior Member

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    Went from OEM 215/50R17 TOYOs to oversized 225/50R17 LRR Continentals and saw no hit.
     
  5. padroo

    padroo Senior Member

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    This is from Tirerack.

    New, Full-Treaded Tires Generate More Rolling Resistance Than Shallow-Treaded, Worn Tires
    Tire rolling resistance gradually drops by about 20% during the life of a tire as the tread wears from its original molded depth to worn out. This can be attributed to the reduction in tread mass and rubber squirm, as well as subtle hardening of the tread compound during years of service and exposure to the elements.


    https://www.tirerack.com/tires/tiretech/techpage.jsp?techid=177
     
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  6. padroo

    padroo Senior Member

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    This is from Tirerack.

    New, Full-Treaded Tires Generate More Rolling Resistance Than Shallow-Treaded, Worn Tires
    Tire rolling resistance gradually drops by about 20% during the life of a tire as the tread wears from its original molded depth to worn out. This can be attributed to the reduction in tread mass and rubber squirm, as well as subtle hardening of the tread compound during years of service and exposure to the elements.


    https://www.tirerack.com/tires/tiretech/techpage.jsp?techid=177
     
  7. Air_Boss

    Air_Boss Senior Member

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    I fully expected that but didn’t see it. Perhaps LRR are smoother/cleaner out of the molds.
     
  8. The Electric Me

    The Electric Me Go Speed Go!

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    As above, I would just expect a MPG dip, when going from worn tires to brand new tires.

    But tires are such a well thoroughly reviewed product today, with so much information available, that everyone with access to a computer and the internet should be able to choose a tire that most closely meets their priorities.

    I personally put more stock in long term owners reviews.
    Manufacturers claims, I think often border on the miraculous.

    But I would expect, if you've bought a Low Rolling Resistance tire, designed for fuel efficiency, you might experience an immediate drop in MPG but that would level out in time.
    If you've bought a tire that's tread design supports other priorities? Then you simply may take a hit.

    I had Goodyear Assurance tires on my Prius, and the MPG was good from day one.
     
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