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How to improve fuel economy

Discussion in 'Gen 3 Prius Fuel Economy' started by Manhal K Alrashdan, Aug 19, 2016.

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  1. Manhal K Alrashdan

    Manhal K Alrashdan Junior Member

    Joined:
    Aug 18, 2015
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    Location:
    jordan
    Vehicle:
    2010 Prius
    Model:
    V
    I have noticed a decreasing mpg ever since I bought my 3rd generation prius a year ago. First , I was getting 52 mpg , then it dropped to about 42 , now I hardly get mire than 36 .My car is well cared for and I use regular gas (92 octane) and I use premium quality fully synthetic oil. I suspected the spark plugs were the issue , so I changed them with no avail. I have heard cleaning the maf sensor and the throttle plate may improve the mpg . Is this true ? Any suggestion is appreciated.
     
    #1 Manhal K Alrashdan, Aug 19, 2016
  2. JimboPalmer

    JimboPalmer Tsar of all the Rushers

    Joined:
    Apr 14, 2009
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    Location:
    Greenwood MS USA
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    Check your 12 volt battery to see if it is over 12 volts after sitting all night. if it is 12.0 or lower get a new AGM battery with external venting and JIS posts.

    Be sure your wheel alignment is good and the tires have proper pressure

    Check your filters, air, Cabin Air, PVC valve, and oil...

    Check for dragging brakes with the tires off the ground.

    A bottle of fuel injector cleaner may help, I do not know how 'clean' Jordanian gas might be.
     
    #2 JimboPalmer, Aug 19, 2016
    bwilson4web likes this.
  3. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
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    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    It's just the rears you can check thus, but yeah, good check.

    (Man it's hard to do a select-text-and-reply on a phone.)
     
    #3 Mendel Leisk, Aug 19, 2016
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    how many miles? what's the timeline? could it be the heat? do you carry any furry pets regularly?
     
    #4 bisco, Aug 19, 2016
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