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MPG during and after break-in period

Discussion in 'Gen 3 Prius Main Forum' started by Doody, Aug 12, 2009.

  1. Doody

    Doody Junior Member

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    Hi everybody, does the fuel consumption increase after the break-in of the engine on a Gen III V?. Thanks.
     
    #1 Doody, Aug 12, 2009
  2. L8rnr

    L8rnr New Member

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    Just passed 1800 miles of highway driving in eco mode and getting an average 55 mpg. Has not increased since break in. Oil was changed today. Maybe I'll see a difference.
     
    #2 L8rnr, Aug 12, 2009
  3. nola_Prius

    nola_Prius New Member

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    I can't say for sure, because I'm not quite to 600 miles yet.
    If anything, I imagine that it might slightly improve...but I doubt anything drastic.
    The more important factor is how you drive the car.

    So far this trip, I've gone about 100 miles, and have been averaging 55 mpg.
    My first tank was a bit lower...around mid-forties.

    It's all (mostly) in how you drive it!
     
    #3 nola_Prius, Aug 12, 2009
  4. ksstathead

    ksstathead Active Member

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    Doody, since you asked, I assume you are not happy with the results so far? If so, please describe your driving pattern, tire pressure, methods used.

    Folks here will be happy to suggests step to better fuel economy.

    I'm from the Stillwater area originally, and now in Wichita, making us practically neighbors. Welcome to Priuschat.
     
    #4 ksstathead, Aug 12, 2009
  5. Doody

    Doody Junior Member

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    I really can't complain about my MPG, I'm getting 45 to 47 driving and accelerating normal and this is in short trips ( 20 to 35 miles ) and the one time I drove a longer trip to OKC about 130 miles I averaged 52.7 with the same driving pattern so, I really think this is great MPG. The reason I'm asking is a lot of threads here mentioned that they get 55 to 57 MPG driving normal ( I understand that their normal might be different than mine..LOL) anyway, I got the V which has 17" rims and that might cause a lower MPG also. I have an 07 Chevy DUramax Diesel and in the break_in period I got 17-18 MPG on the highway but now I get 21 to 22 MPG and I was wondering if the Prius might have some increase after the break-in period. Thanks.
     
    #5 Doody, Aug 12, 2009
  6. ksstathead

    ksstathead Active Member

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    Never has a car had a wider range of 'normal driving' than the Prius. Many threads suggest a benefit over the first several thousand miles as things loosen up. I suspect that benefit is hard to isolate from the driver getting better at taking advantage of the car's potential. But I do suspect break-in will help a bit.

    If you want to ramp up the mpg, look at the threads here and at cleanmpg.com dealing with fuel economy, pulse & glide, superhighway mode, etc. Also, moderate speed and drive like your brakes don't work (conserve momentum). Add psi up to max sidewall and see what happens. PSI=MPG.

    The 17" wheels may take away a little, but they are rated the same by the EPA, so it has to a small impact.

    Anyway, good luck, and congrats on a great car.

    Had a college roommate who claimed Burlington/Byron/Amorita/Capron/Driftwood as his hometown. Also have in-laws of in-laws in Goltry and relatives and friends in Enid. Your's is good country.
     
    #6 ksstathead, Aug 12, 2009
  7. jay_man2

    jay_man2 jay_man_also

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    I'm at 2300 miles in 8 weeks, and haven't noticed any material change, other than that I don't drive like Granpa all the time like I did at first.
     
    #7 jay_man2, Aug 12, 2009
  8. gil

    gil Junior Member

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    I take most claims of really high MPG as wishful thinking. Most use a short term drive average and will claim that is their "normal", just being normal human beings....

    My experience with my previous 05 Prius, the mileage did rise after about 5K miles on the order of 5 to 10% with outside temperature having the greatest impact. Maintaining proper tire pressure is the biggest contributor to good mileage as well as paying attention (carefully of course) to the economy displays while driving. Funny how real-time feedback helps improve your economy.
     
    #8 gil, Aug 12, 2009
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