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Gas mileage!

Discussion in '1st Gen. Tacomas' started by joeyhunter, Apr 9, 2014.

  1. Apr 9, 2014 at 4:42 PM
    #1
    joeyhunter

    joeyhunter [OP] Member

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    I got through the 2nd tank of gas in my truck (2.7 ,5 speed , 31.5 tires ) only getting 17.5 mpg. Is that normal? I was hoping for more like 20 -21 mpg.
     
  2. Apr 9, 2014 at 5:03 PM
    #2
    Charlie5280

    Charlie5280 Member

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    Yep. The rolling resistance of those tires is very high.

    If you went to stock you'd see 20/21. But that's it. The 2.7 isn't a new design.....combustion chambers, aero, and direct injection would be the only things to change it's efficiency.
     
  3. Apr 9, 2014 at 5:04 PM
    #3
    frizzman

    frizzman Well-Known Member

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    hitch w/ 7-pin (custom wired), Leer cap (LMM), Green Filter, JVC head unit (orange color to match), Infinity amp/10" subs. Undercover tonneau.
    take off the cap for summer too :)
     
  4. Apr 9, 2014 at 5:05 PM
    #4
    Pchop

    Pchop Beavis Killer

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    There are about 20 threads on gas mileage
     
  5. Apr 9, 2014 at 5:11 PM
    #5
    Yota Nation

    Yota Nation Well-Known Member

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    I get 12
     
  6. Apr 9, 2014 at 5:12 PM
    #6
    Charlie5280

    Charlie5280 Member

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    ^ This lol
     
  7. Apr 9, 2014 at 5:14 PM
    #7
    smmarine

    smmarine Well-Known Member

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    Use less skinny petal. I get about 17 out of my auto v6 on 31s. Whats your gear ratio?
     
  8. Apr 9, 2014 at 5:22 PM
    #8
    joeyhunter

    joeyhunter [OP] Member

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    I do have my cap off. My gears are 3.89 I believe, going by the door tag.
     
  9. Apr 9, 2014 at 5:25 PM
    #9
    smmarine

    smmarine Well-Known Member

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    3.89 might be a little under geared for 31s. At least I think so. My v6 has 4.10, with a 4 cyl i wouldn't want less then 4.56. If you are having to give it a lot of skinny petal cause of the gearing and tires, that is your problem
     
  10. Apr 9, 2014 at 5:29 PM
    #10
    Huntn57

    Huntn57 Well-Known Member

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    i com 2300 ham radio. for hunting (170 k miles) list of replacements since 166k miles: 4wd solenoid tailpipe muffer catalitytic conver exhaust manifold
    1995 2.7 with 225/60/15 i get 22.5
     
  11. Apr 9, 2014 at 6:14 PM
    #11
    Mod

    Mod Well-Known Member

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    17.5 is right in the ballpark,,for having a cap and non oem tire sizes.

    Every truck is a bit different,,so results vary no matter what you do to try to correct it.
     
  12. Apr 9, 2014 at 6:17 PM
    #12
    Tjsingle26

    Tjsingle26 Well-Known Member

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    My last tank was 22.5mpg with 2.7L 2003 tacoma 4x4
     
  13. Apr 11, 2014 at 7:02 PM
    #13
    joeyhunter

    joeyhunter [OP] Member

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    Any value in mpg switching to manual hubs ?
     
  14. Apr 11, 2014 at 8:20 PM
    #14
    Yamaha Dave

    Yamaha Dave Well-Known Member

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    Maintenance has a huge part of it too along with tire size, weight, and aftermarket add ons such as aftermarket bumpers, light bars, etc..

    I'm getting about 310 miles on each tank.
     
  15. Apr 13, 2014 at 2:34 PM
    #15
    Aquatic Tacoma

    Aquatic Tacoma The bees know...

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    The 17mpg depends what the the stock tire size was. My truck is stock with 31 x 10.5, except for a K&N flat replacement filter. I've been driving it since new, 260,000 miles now. 20mpg city/ 21-22mpg highway.
     
  16. Apr 13, 2014 at 2:41 PM
    #16
    smmarine

    smmarine Well-Known Member

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    If you have auto locking hubs, I'm pretty sure they're always locked and the front axle is always spinning. So yes it would improve mpg. I just don't know how much. Someone correct me if I'm wrong
     
  17. Apr 15, 2014 at 12:41 AM
    #17
    donson6

    donson6 Well-Known Member

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    Those tires are causing you bad mpg, take those off and put the oem size tire on, and you mpg will go up. Me, I don't care about mpg, love my big tires. I got 37's on my Ram 3500 (diesel) with a 7" lift. I get about 10.5-12mpg in my diesel truck, and spend 120 bucks to fill the beast up. You gotta pay to play...
     
  18. Apr 16, 2014 at 4:55 PM
    #18
    frizzman

    frizzman Well-Known Member

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    could be a little from the tires, 31" (30.6) is the norm for 4wd. with 3.89 gears, doesn't seem right to me but maybe Toyota liked to mix it up, but usually 4.30 so maybe need better gearing or to even bump down more on tires?
     
  19. Apr 16, 2014 at 5:07 PM
    #19
    smmarine

    smmarine Well-Known Member

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    Even my v6 is a 4.10. I would say the tires/gears are the problem. I would go to at least 4.30, but probably 4.56. I thought most 4cyl 6 lug came with 4.56, but I'm finding out it's almost impossible to guess haha
     
  20. May 17, 2014 at 2:55 AM
    #20
    Len04Taco

    Len04Taco Well-Known Member

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    :)

    So far, highway driving (200mi R/T) the best I have gotten is 21.5 mpg with 4WD V6 stick using cruise w speeds 65-70 & tailgate up. I have 4.10 gears & stock 265/70R16 knobby tires. Basically this is totally stock, as delivered in 2004.

    Since I drive this route 2-3 times ea week, I really need better mileage. At my destination I must have 4WD. (My 99 2WD 2.7 Taco automatic got 30mpg, but could not get up my driveway.)

    I am looking into 3.91 gears and Manual Locking Hubs. (Actually buying these items presently.)

    Also plan to buy skinny low-rolling resistance tires in the near future. My ultimate goal is 25mpg highway.

    Len

    :)
     
    Last edited: May 17, 2014
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