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Recent Sharp Drop in Gas Millage

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Cell4130, Aug 27, 2010.

  1. Aug 27, 2010 at 11:04 AM
    #1
    Cell4130

    Cell4130 [OP] Member

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    I know there are 4200214 topics on gas millage, but Ive browsed through them and its gotten me no where.

    2008 DC Prerunner, 65k Miles

    I purchased my truck June 1st. Since then, Ive put 5000 miles on it since then...

    Worst fill up was about 17.4 MPG, best about 22.1 MPG, and for the most part, theyve all been about 18 MPG.

    The past two tanks have been about 15-16 MPG and NOTHING has changed. My driving is the same, the same roads, same AC usage, everything. I cannot for the life of me figure out why Ive dropped that far with nothing really changing. This tank Ive even tried to be as soft on the skinny pedal as I can be, and it didn't help.

    Suggestions?
     
  2. Aug 27, 2010 at 11:14 AM
    #2
    Jester243

    Jester243 mod status????

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    [​IMG]
    lead foot? :notsure:

    My milage is all over the place even though my route remains the same. I try not to worry about it too much since it is not a Prius.
     
  3. Aug 27, 2010 at 11:21 AM
    #3
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    recent weight gain?:notsure:
     
  4. Aug 27, 2010 at 11:25 AM
    #4
    Lonewolf

    Lonewolf Well-Known Member

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    King Racing reservoir shocks, Camburg UCA's, Deaver 10 leaf pack, Bilstein 5100's, Magnaflow exhaust.
    Fuel filter?
     
  5. Aug 27, 2010 at 11:31 AM
    #5
    BakoTruck

    BakoTruck Well-Known Member

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    Herbie Hancock
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    Mostly stock for now, I have added a cb radio, various cheap mods and I plan on adding aftermarket wheels and other items in the future.
    Filter is in the tank, doesn't need to be changed. I think Toyota recommends a change every 100K


    Obviously the best thing you can do is change your driving habits, no speeding, no fast acceleration, no heavy braking, do more coasting, etc, etc.

    Have you done any maintenance? Tune-up, spark plug change, fuel system cleaner, clean MAF/throttle body, change all oil's and fluids, alignment, balance/rotate tires, proper inflation, etc, etc?
    These factors can greatly change your MPG's.
     
  6. Aug 27, 2010 at 11:37 AM
    #6
    itsmyturn

    itsmyturn Well-Known Member

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    afe Pro-Dry S dropin, Readylift leveling kit, TRD skid plate, Alpine CDA-9887, 6K D2S HID
    I notice the same. I have a 2008 DC with 62000 miles. Sharp drop off in fuel economy. A buddy of mine noticed the same with his V6 Accord. Only thing I keep telling myself is the quality of fuel may have gone down. This may have some affect but I'm gonna try different fuel stations, brands and octane.
     
  7. Aug 27, 2010 at 12:31 PM
    #7
    PLC721

    PLC721 Well-Known Member

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    hahaha :rofl:
     
  8. Aug 27, 2010 at 2:57 PM
    #8
    JB3CK24

    JB3CK24 Return to the 36 Chambers

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    I had the same thing happen recently... went from 18.5 down to 17 and it kept dropping. Changed my oil... brought the tires up to 36psi and used the A/C a little bit less... bam, 19.2 MPG.
     
  9. Aug 27, 2010 at 3:14 PM
    #9
    chaztoyo

    chaztoyo Well-Known Member

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    I know a couple of years ago when all of the local stations went to 10% corn gas, my mileage dropped by 10% immediately in every vehicle I own.

    Like the others I would check tire air pressure, and just think carefully if anything else might have changed. Good luck.
     
  10. Aug 28, 2010 at 9:37 AM
    #10
    Cell4130

    Cell4130 [OP] Member

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    I checked all my tires, all are at 35-37 PSI. I just filled up... 14.7 MPG.

    This is quite concerning, considering I have never gotten worse than 17, and usually was closer to 18 or 19.
     
  11. Aug 28, 2010 at 9:51 AM
    #11
    BakoTruck

    BakoTruck Well-Known Member

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    Mostly stock for now, I have added a cb radio, various cheap mods and I plan on adding aftermarket wheels and other items in the future.
    Are you sure you're calculating it right?
     
  12. Aug 28, 2010 at 9:58 AM
    #12
    David K

    David K Well-Known Member

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    Differential Breather Mod Light Bar: 2 Hella 4000 HID, 1 Cibie Halogen. Bilstein 5100s Ride Rite Air Bags
    Gasoline formulation changes during the year to keep the tree huggers happy... Of course it means we burn more gasoline to go the same distance, since it is diluted with corn syrup (ethenol) and other 'eco-friendly' crap to 'reduce emissions'. I get one or more miles per gallon when in Mexico driving the same as here... pure gasoline there, no ethenol!
     
  13. Aug 28, 2010 at 10:47 AM
    #13
    Fore

    Fore Well-Known Member

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    I have a 2007 Prerunner, been averaging around 22 mpg. Make sure you put the highest octane 91 or better because of the 10% corn their using. When you fill up your tank do not overfill stop when it clicks off to calculate properly each time. Put in a better airfilter APO Pro S I believe its called. Try and keep your RPM's around 1500 if you can, NO! quick starts on the Freeway or your lose mpg very fast. I keep all my tire's inflated around 34psi. Remember the larger the tires and other equipment you add on will lower your mpg also. Hope that helps!
     
  14. Aug 28, 2010 at 11:06 AM
    #14
    Tojo

    Tojo Well-Known Member

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    Mobil 1 0-20W, Tacoma bed mat, tailgate anti-theft, oil filter drain hose, back seat headrest removal, a/c back seat platform, rear spring tsb, Tek.Prodigy P2 electric brake cntrl, Toyota Bed Extender
    x2.....change the oil and filter, air filter, maybe a set of spark plugs??
     
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