1. Attachments are working again! Check out this thread for more details and to report any other bugs.

MPG dropped after 10,000km (6,200miles) service

Discussion in 'Prius c Fuel Economy' started by jasonfct, Feb 17, 2013.

  1. jasonfct

    jasonfct Junior Member

    Joined:
    Oct 3, 2012
    21
    7
    0
    Location:
    Penang, Malaysia
    Vehicle:
    2012 Prius c
    Model:
    N/A
    Hi dear C owners, after I did my 10,000km (6,200miles) service at a local service centre, I noticed after 2 fuel ups, my MPG dropped roughly 15%, from 53mpg to 45mpg. For the record, I did all standard service recommended by Toyota, as well as balancing and alignment. Driving conditions are the same. I am worried, is that normal?
     
    #1 jasonfct, Feb 17, 2013
  2. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,677
    39,222
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    * Hove you got your tire pressures raised? Dealerships tend to set it back to spec.

    * Are you supposed to use OW20 motor oil? Does it different on the invoice? Even it does, it's hard to prove: they might have put in something cheaper/heavier.

    * Check your oil level, they might have overfilled.

    * Maybe the alignment actually messed things up? I'm not sure, but think the only thing readily adjustable is toe-in.

    And how much mileage has elapsed since the service? If you're still on the same tank, without reset trip meter, it could be something as simple as the dealership idling the car excessively.
     
    #2 Mendel Leisk, Feb 17, 2013
  3. jasonfct

    jasonfct Junior Member

    Joined:
    Oct 3, 2012
    21
    7
    0
    Location:
    Penang, Malaysia
    Vehicle:
    2012 Prius c
    Model:
    N/A
    Hi Mendel, thanks very much for your reply...i "troubleshot" base on your checklist:

    I'll get back here soon...
     
    #3 jasonfct, Feb 17, 2013
  4. jasonfct

    jasonfct Junior Member

    Joined:
    Oct 3, 2012
    21
    7
    0
    Location:
    Penang, Malaysia
    Vehicle:
    2012 Prius c
    Model:
    N/A
    Hi Mendel...thanks for your info, it was the alignment! My C is back to normal now..cheers!
     
    #4 jasonfct, Feb 25, 2013
  5. phenoyz

    phenoyz Member

    Joined:
    Jan 31, 2012
    108
    2
    0
    Location:
    nevada
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    alignment for only 6,200 miles?
     
    #5 phenoyz, Feb 25, 2013
  6. arlotone

    arlotone New Member

    Joined:
    Mar 27, 2012
    25
    8
    0
    Location:
    Portland, OR
    Vehicle:
    2012 Prius c
    Model:
    Two
    I had problems with the electric locks and some other electronics failing around 6000-7000 miles. I took it to the dealer who quickly fixed it under warranty. However, I then noticed an immediate drop in mileage of up to 5 mpg on 20-minute trips around town. I was worried that the mpg had been reporting falsely high before and this was my "real" mpg after some kind of system recalibration.

    Then I finally discovered the problem: the repair process had turned off the Eco Mode, which I normally leave on all the time. I turned it back on and my mpg returned to its typical 52-56 mpg for in-town use. Whew!
     
    #6 arlotone, Mar 1, 2013
    ztanos likes this.
  7. F8L

    F8L Protecting Habitat & AG Lands

    Joined:
    Aug 14, 2006
    19,011
    4,081
    50
    Location:
    Grass Valley, CA.
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    There is no guarantee your alignment is correct from the factory so it's not a terrible idea to have it checked early. Still, if tires are wearing evenly after 6k miles I wouldn't have messes with it.
     
    #7 F8L, Mar 2, 2013
(You must log in or sign up to post here.)