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Another bad MPG thread

Discussion in '2nd Gen. Tacomas (2005-2015)' started by fyremanpat, Nov 1, 2012.

  1. Nov 1, 2012 at 9:11 AM
    #1
    fyremanpat

    fyremanpat [OP] Well-Known Member

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    My 13 Taco now has 1400 miles and the gas mileage is getting worse. I didnt buy the truck for the mileage but its now at 14 mpg city and I even went easy on the throttle. The best i can get on hwy is 17 mpg. I have an Airaid intake and Borla muffler. Ive checked tire pressures too. Any ideas? ...the only thing is that with the airaid kit it was for the 12 Tacomas. The 13's have a 4 wire AIR pump and the older Tacomas have a 2 wire AIR pump so i had to cut and splice wires. The AIR pump DOES still work ( I can hear it) is it possible that the wires are switched? And would it cause the mileage to go down? Thanks
     
  2. Nov 1, 2012 at 9:18 AM
    #2
    rab89

    rab89 Well-Known Member

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    It will get better as the truck breaks in, but you are also running big heavy tires compared to stock, are you taking into account the tire size when calculating mpg?

    and depending on where you live, the gas stations may be on winter gas now, which is shiiittyy!
     
  3. Nov 1, 2012 at 9:22 AM
    #3
    fyremanpat

    fyremanpat [OP] Well-Known Member

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    i was getting 17mpg before with the bigger tires..maybe it is the winter blend gas...also ive had to use the defrost a lot lately...i forgot about that part
     
  4. Nov 1, 2012 at 11:52 AM
    #4
    ziggynagy

    ziggynagy All Glory To The Hypnotoad

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    lift, larger tires, taking rpm above 2k = worse mpg
    Like Rab89 said, the winterblend isn't helping either but you'll get better mpg with the switch back to non-winter fuel in April/May. Scroll down to the bottom and view "Similar Threads" for more information as this gets discussed ad nauseam.
     
  5. Nov 1, 2012 at 12:05 PM
    #5
    ziggynagy

    ziggynagy All Glory To The Hypnotoad

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    Also, you didn't mention how you're calculating mpg (odometer/trip, scangauge, ultraguage, etc). If you're using the odometer and want to accurately get mpg you have to account for the increase in tire diameter as it means 6.2% reduction in revs per mile... so your 17.1mpg is truly 18.2mpg
     
  6. Nov 1, 2012 at 12:23 PM
    #6
    BTO

    BTO Well-Known Member

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    Another "I lifted and installed oversized wheels and now I can't understand why my mpg is ass" thread? :(
     
  7. Nov 1, 2012 at 1:27 PM
    #7
    SoCaltaco65

    SoCaltaco65 Well-Known Member

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    Fixed*
     
  8. Nov 1, 2012 at 1:55 PM
    #8
    fyremanpat

    fyremanpat [OP] Well-Known Member

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    Oh thanks for pointing that out. Thats truly a help...thanks dick!...my truck has been lifted since 150 miles. I know that extra weight is gonna cause that. Not my first lifted truck. My point is that recently its gone down.
     
  9. Nov 1, 2012 at 1:58 PM
    #9
    Dmonkey

    Dmonkey Drop it Drop it Low

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    more like larger rolling mass, try putting on the stock intake as well.
     
  10. Nov 1, 2012 at 2:00 PM
    #10
    overactor

    overactor Well-Known Member

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    The intake will change the intake and therefore the fuel calibration. Dont know how long you have had that on there. I tune subaru's and putting an intake on the car without adjusting the tune for it makes for some really shitty fuel mileage. I think 17 something isnt bad considering the factory sets mpg on Ethanol free fuel and most of us drive with E10
     
  11. Nov 1, 2012 at 2:03 PM
    #11
    fyremanpat

    fyremanpat [OP] Well-Known Member

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    I went from 17 to 14. I havent had it tuned for the intake...but its in the works
     
  12. Nov 1, 2012 at 3:35 PM
    #12
    iroh

    iroh Well-Known Member

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    Did the air get colder? The magic cutoff seems to be about 45°F when the mileage really goes down the toilet on my truck.

    Though I have skinny stock tires so "down the toilet" means anything under 21.
     
  13. Nov 1, 2012 at 4:00 PM
    #13
    mirraman

    mirraman Well-Known Member

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    Set odometer to zero when you fill up next (don't top off).
    Drive normally until you need gas.
    Write down how many miles on trip odometer at next fill up then write down how many gallons of gas it took and don't top off.
    Divide miles on trip odometer by 0.927.
    Divide answer by gallons of gas pumped into tank.
    This will give you your MPG. The 285s your running are 7.3% bigger in diameter than the stock tires. (http://www.tacomaworld.com/forum/tirecalc.php?tires=265-70r16-285-75r16) . You have to calculate for the difference.
    Lets say you drove 230 miles according to your trip odometer. 230/0.927=248.
    you acually drove 248 miles.
     
  14. Nov 1, 2012 at 4:54 PM
    #14
    Moose1988

    Moose1988 ____livevil____

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    is the airaid a sealed box intake? or just a heat shield? if its just the shield, sucking in that hot air is gonna be a factor. trust me.. i know. :cool:

    I was running the AFE Stage II (open heat shield) for about a year.. recently switch to the 2nd Gen TRD intake and noticed my MPG's went up. was averaging anywhere between 16.5-18.5 with the AFE.. now im around 19.5 consistantly.
     
  15. Nov 1, 2012 at 4:58 PM
    #15
    Aw9d

    Aw9d That one guy

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    14! I can't even get 14 when I floor it around town, I still avg 15-16+ and I only have 11k miles. I typically get 19-21 as an avg.
     
  16. Nov 1, 2012 at 5:02 PM
    #16
    650H1

    650H1 Well-Known Member

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    do your spacers give you better MPG?

    :laugh:

    seriously, i get like 15mpg combined average, and have load range D 285's. OP i would try running a higher octane and see if that helps? you may just have to break it in.
     
  17. Nov 1, 2012 at 6:47 PM
    #17
    rab89

    rab89 Well-Known Member

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    no :( I'm thinking of getting rid of my brand new shocks, and buying some brand new shocks to replace them with, then I can jump my truck, thus better gas mileage as I won't need to use any fuel once I am in flight... 5100's here I come!!!!!!
     
  18. Nov 1, 2012 at 7:58 PM
    #18
    Jimmyh

    Jimmyh Well-Known Member

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    Dump the shitty Airaid intake and go back to stock.
     
  19. Nov 1, 2012 at 10:19 PM
    #19
    650H1

    650H1 Well-Known Member

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    You are not correct :laugh:

    On a side note, at least you can take a joke. Wouldn't believe how many members would be hoping to catch me in a dark alley for that :rolleyes: hahaha
     
  20. Nov 1, 2012 at 10:33 PM
    #20
    Markallyn86

    Markallyn86 I like tacos and burritos

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    OME kit 885, LR UCA, XD addict 17's, 265 70 Nitto, ultra gauge, weather tech
    My ultra gauge says that my avg mpg is 14.5. 18 to 20 on the freeway at 70ish... 12 /14 or less in the city which is where I drive 90% of the, time.. These numbers are from two weeks of driving with the gauge. Not bad if you stay on the highway..
     
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