1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Tailgate open = Better Gas Mileage?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by MTLTaco, Jun 25, 2009.

  1. Jun 25, 2009 at 11:25 AM
    #1
    MTLTaco

    MTLTaco [OP] Well-Known Member

    Joined:
    Apr 13, 2009
    Member:
    #15935
    Messages:
    358
    Gender:
    Male
    Montreal
    Vehicle:
    09 Double Cab TRD
    Was wondering if anyone drives on the highway with there tailgate open for better MPGs. My friend told me that this actually works?
     
  2. Jun 25, 2009 at 11:26 AM
    #2
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

    Joined:
    Dec 18, 2008
    Member:
    #11714
    Messages:
    49,807
    Gender:
    Male
    First Name:
    Ben
    Beech Creek
    Vehicle:
    05 Tundra SR5 (+250k AND COUNTING), 88 SR5 PU (SOLD), 98 TRD OR (CRUSHED)
    5100's all on fours
    Mythbusters did this and found a tailget net improved MPG's. I believe the tailgate down was worse.
     
  3. Jun 25, 2009 at 11:29 AM
    #3
    oshky

    oshky Well-Known Member

    Joined:
    May 4, 2009
    Member:
    #16785
    Messages:
    175
    Gender:
    Male
    OHIO
    Vehicle:
    05 Taco
    3" Revtek Lift, 2"AAL/5100's(Rear) BHLM, Foglight Mod,Smoked Tails, 17"Eagle Black wheels, 33" Nitto's, Kenwood DNX7180..More to come!

    +1
     
  4. Jun 25, 2009 at 11:30 AM
    #4
    johnw

    johnw Well-Known Member

    Joined:
    May 18, 2009
    Member:
    #17381
    Messages:
    7,181
    Gender:
    Male
    First Name:
    john
    orlando florida
    Vehicle:
    06 prerunner v-6 4.0L 4 door
    well you asked for specs..... 06 trd sport speedway blue V-6 4.0 camburg lift spindles extended travel icons total chaos lowers allpro 4" leaf pack 17" xd hoss rims 305/65/17 mickey thompson baja atz Allpro hybrid bumper with 3 kragen HID lights color matched headlights grill craft grill AFE stage 3 CAI wicked flow muffler under cover bed cap inside i have..... wet okole real tree camo seat cover blue oznium dome light stealth sub box with 2 10" kicker comp subs kicker 400 watt amp weathertech floor mats
    tailgate up was better gas mileage tailgate down was worse
     
  5. Jun 25, 2009 at 11:31 AM
    #5
    TacticalBacon13

    TacticalBacon13 Sorry for party rockin'

    Joined:
    Mar 24, 2008
    Member:
    #5480
    Messages:
    16,169
    Gender:
    Male
    First Name:
    Dunk
    Beech Creek
    Vehicle:
    2014 tundra platinum
    baby seat and a muffler
    correct young paddawan.
    “When the tailgate is raised, a “separated bubble” of stagnant air is formed in the bed of the pickup. Wind tends to swoosh over this bubble as though it were part of the truck. Lower the tailgate, and the bubble disappears, which leads to increased wind resistance.”
     
  6. Jun 25, 2009 at 11:32 AM
    #6
    w8n4mud

    w8n4mud There's a mod for that!

    Joined:
    May 23, 2008
    Member:
    #6831
    Messages:
    6,204
    Gender:
    Male
    First Name:
    Albert
    San Diego, CA
    Vehicle:
    2015 Subaru WRX
    Bilsteins 5100's (Front & Rear), GrillCraft, Line-X'ed Skid Plate & Bumper Valence, Blacked out hood scoop, Avid Light Bar and much more.
    :confused:
    What! :eek:
    I think that show allows you to look at previous aired shows on their website. Give that a shot. I naturally would assume down is better, but because I love my Taco and appearance is everything, well then the tail gate stays up. I wish I still had my bed cover! :rolleyes: Oh well.
     
  7. Jun 25, 2009 at 11:33 AM
    #7
    TacticalBacon13

    TacticalBacon13 Sorry for party rockin'

    Joined:
    Mar 24, 2008
    Member:
    #5480
    Messages:
    16,169
    Gender:
    Male
    First Name:
    Dunk
    Beech Creek
    Vehicle:
    2014 tundra platinum
    baby seat and a muffler
    here is a pdf all about this subject.
    http://ecow.engr.wisc.edu/cgi-bin/getbig/me/363/ghandhi1/pickup.pdf
     
  8. Jun 25, 2009 at 11:33 AM
    #8
    Toyota Truck

    Toyota Truck Well-Known Member

    Joined:
    Nov 21, 2008
    Member:
    #10925
    Messages:
    1,942
    Gender:
    Male
    First Name:
    JT
    Texas
    Vehicle:
    2008 Prerunnner
    Magnaflow Muffler-TSB springs-Nuvi 265wt-aFe pro dry s filter-Husky Liners-Blue dome light-extra d-rings-OME 90000 sport struts-885 coils-N182 shocks-TSB AAL-LR UCAs-procomp black alloy rims- nitto terra grapplers-20% tint
    Yeah, what they said.
     
  9. Jun 25, 2009 at 11:40 AM
    #9
    ItalynStylion

    ItalynStylion Sounds Gooooood

    Joined:
    Jun 15, 2009
    Member:
    #18467
    Messages:
    4,865
    Gender:
    Male
    First Name:
    Steven
    DFW, Tx.
    Vehicle:
    09 Double Cab TRD Sport 4x4
    This is correct. Have you ever seen a leaf or paper cup in your truck bed kinda float around in the air right behind the cab of the truck? That's that "bubble" of stagnant air that is trapped almost acts like a solid part of the car making it appear more aerodynamic than it really is.
     
  10. Jun 25, 2009 at 11:50 AM
    #10
    kilgoja

    kilgoja Well-Known Member

    Joined:
    Jun 20, 2009
    Member:
    #18685
    Messages:
    592
    Gender:
    Male
    Alabama
    Vehicle:
    2009 regular cab 4x4 2.7L (silver)
    :mudding:
    yes!!! i knew i was right all those years back when people would tell me to lower my tailgate....i never did it....always kept it up...yessssss!!!!!!
     
  11. Jun 25, 2009 at 11:59 AM
    #11
    jonny

    jonny Betty White Edition Heep ZJ

    Joined:
    Jun 21, 2007
    Member:
    #1887
    Messages:
    8,375
    Gender:
    Male
    First Name:
    John
    yupp. mythbusters did it... tailgate net was the best IIRC.
    tailgate down ftl!
     
  12. Jun 25, 2009 at 12:02 PM
    #12
    Janster

    Janster Old & Forgetful

    Joined:
    Mar 25, 2007
    Member:
    #1138
    Messages:
    14,256
    Gender:
    Female
    First Name:
    Jandy
    Lancaster, PA
    Vehicle:
    2016 GMC Canyon SLT w/ LineX and....
    The one thing Mythbusters didn't do....was test a SOFT tonneau cover.

    They tested a 'hard' one - which would've weighed more than a soft. It wasn't as impressive as I would've thought.
     
  13. Jun 25, 2009 at 12:08 PM
    #13
    MTLTaco

    MTLTaco [OP] Well-Known Member

    Joined:
    Apr 13, 2009
    Member:
    #15935
    Messages:
    358
    Gender:
    Male
    Montreal
    Vehicle:
    09 Double Cab TRD
    I guess my friend is full of S__T then. Thanks guys for the replies.
     
  14. Jun 25, 2009 at 12:10 PM
    #14
    Fluffymonkey

    Fluffymonkey Token

    Joined:
    Jul 14, 2008
    Member:
    #7932
    Messages:
    2,177
    Gender:
    Male
    First Name:
    Matt
    College Station, TX/ Lawrence, KS
    Vehicle:
    2013 Trd Sport DC, 07 DC sr5
    2007: Avid sliders, 30% front tint, Truxedo low-pro qt tonneu cover, aero turbine 2525 muffler w/ 8'' tip, AR25 Resonator, 16x8 Dick Cepek DC-1 w/ 265/75 Goodyear Wrangler Duratracs, 2010 headlights, ome 884 coils with .5'' top plate spacer, OME sport front shocks, blisten 5100s rear, 2'' aal, locking gas cap, LR ucas, Viper 2-way remote start, afe drop in filter, Rocky locking bike mounts, gear chest, scanguage, pop n lock tailgate lock 2013: most things transferred over from my 07, 5100s @ .85 + eibachs, wheelers progressive aal w/ overload
    I always wondered it if really made a difference. Good to know :)
     
  15. Jun 25, 2009 at 12:15 PM
    #15
    nasty ned

    nasty ned Well-Known Member

    Joined:
    Mar 4, 2009
    Member:
    #14311
    Messages:
    136
    Gender:
    Male
    mass
    Vehicle:
    05v6trd access
    nerf bars ventvisor kit nose & windows
    i believe there is a thread some where here in t.w. with some actual tests done that show absolutely no improvement on mpg's (with,without,caps,tonneau's) etc.
     
  16. Jun 25, 2009 at 12:20 PM
    #16
    gozar

    gozar Well-Known Member

    Joined:
    Apr 10, 2008
    Member:
    #5890
    Messages:
    476
    Gender:
    Male
    First Name:
    Matt
    Arizona
    Vehicle:
    2007 TRD Off-Road 6 speed manual
    Tailgate down blocks your license plate from speed cameras.
    You can buy a lot of fuel with what one speeding ticket costs you.
     
  17. Jun 25, 2009 at 12:22 PM
    #17
    Brunes

    Brunes abides.

    Joined:
    May 31, 2008
    Member:
    #7011
    Messages:
    17,641
    Gender:
    Male
    First Name:
    Rotorhead
    DC or New Jersey - Depends on the day....
    Vehicle:
    08 Red/Graphite and Satin Black
    Inside: Tint, Wet Okole 1/2 Piped Red/Black Covers, Black Weathertech Digital Fit Mats, URD Short Throw w/ TWM Weighted Knob, USA Spec iPod adapter. Outside: 4300K Retro w/ Angel Eyes and Red Shrouds, 5000K Blazer Fog Light Retrofit, Debadge, Bed Locking Handle, Satin Black Rims Performance: TRD/Steigmeier Blower w/ 2.7 Pulley. 668 Injectors and 320 LPH AEM Fuel pump. URD UCON and 7th Injector. DTLT Headers, URD Y-Pipe, Wicked Flow Muffler. Suspension: Both: OME Shocks Front: 886X's and TC UCAs Rear: Dakars Armor: Relentless Front Bumper Relentless High Clearance Rear w/ Tire/Rotopax Swing Out Relentless Front, Mid, and TCase skids BAMF Diff Skid Recovery and Spares: Fullsize Spare Tire 2x2 gal Rotopax 1x1 gal Rotopax 1x1 gal Water Rotopax Warn 9.5XP-S Winch Hi-Lift Extreme 60" Ironman Off-Road Recovery Kit
    Or you can just not speed and you won't worry about tickets and you can save a few bones on gas...:rolleyes:
     
  18. Jun 25, 2009 at 12:49 PM
    #18
    Padilla1880

    Padilla1880 "Let's Ride!"

    Joined:
    May 18, 2009
    Member:
    #17365
    Messages:
    1,167
    Gender:
    Male
    First Name:
    Daniel
    Temecula, CA
    Vehicle:
    05 TRD OffRoad V6 SR5 PreRunner
    Used to roll with my tg down about two years. Then switched to rolling with it up. Pretty much the same. Just keep it up that way you won't get it dinged up.
     
  19. Jun 25, 2009 at 12:52 PM
    #19
    gozar

    gozar Well-Known Member

    Joined:
    Apr 10, 2008
    Member:
    #5890
    Messages:
    476
    Gender:
    Male
    First Name:
    Matt
    Arizona
    Vehicle:
    2007 TRD Off-Road 6 speed manual
    My friend - In Phoenix... as in many cities ... that would be suicidal! :eek:

    I remember driving in Detroit once - the traffic was bumper to bumper, but every vehicle was going 80 mph! Nerve wracking.
     
  20. Jun 25, 2009 at 1:12 PM
    #20
    carmellocafe

    carmellocafe Begin With The End In Mind.

    Joined:
    May 15, 2009
    Member:
    #17267
    Messages:
    2,266
    Gender:
    Male
    First Name:
    KEVIN
    N. California
    Vehicle:
    2014 TRD OR Access cab longbed
    I saw this too. Then put it to the test myself. I definitely get better gas mileage with tailgate UP. Apparently it creates some sort of "vacuum" which decreases wind resistance. Leaving the tailgate DOWN, or taking it completely off in fact hurt the mileage.:eek: I was very surprised.

    There are a ton of posts on this here.
     
To Top