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Author Topic: Trucks - tailgate up is better Back to Topics
WEPSMAN
Champion Author
South Dakota

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Message Posted: May 27, 2013 9:39:07 PM

Here is a link for testing done on the 2014 Sierra. Wind tunnel shows less resistance with tailgate up.

http://www.foxnews.com/leisure/2013/05/20/tailgate-up-or-down-gmc-solves-age-old-pickup-truck-mystery/
REPLIES (newest first) Post a Reply
Vin63
Champion Author San Bernardino

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Message Posted: Jul 24, 2014 9:50:28 AM

Yes, driving at speed, the tailgate up helps reduce drag.
dontuknowOH
Champion Author Ohio

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Message Posted: Jul 24, 2014 8:37:39 AM

Yey and most trucks often haul an amount of scrap debris from leftover projects, potholes can shake it out the rear as a problem.
Dennis783
Champion Author Des Moines

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Message Posted: Jul 24, 2014 7:04:45 AM

wouldn't leave it down when driving anyway
redfish67
Champion Author Dallas

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Message Posted: Jul 13, 2014 9:34:12 AM

ok
OceanArcher
Champion Author Mississippi

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Message Posted: Jul 12, 2014 11:29:56 AM

Always more at ease following a truck who's tailgate is closed and latched
dontuknowOH
Champion Author Ohio

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Message Posted: Jul 12, 2014 8:29:43 AM

It depends on what type of air you are transporting in the truck bed.
dassfg
Champion Author Fort Worth

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Message Posted: Jul 12, 2014 8:14:30 AM

Tailgate up was proven best a long time ago
randy3116
Champion Author Tennessee

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Message Posted: Jul 12, 2014 7:30:55 AM

ok
twt
Champion Author Virginia Beach

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Message Posted: Jul 12, 2014 4:55:20 AM

It's against the law here, to drive with the tailgate down.
46chief
Champion Author Indiana

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Message Posted: Jul 11, 2014 1:58:37 PM

I have a bed lid on our truck so I'm guessing it doesn't matter.
Awing1
Champion Author Ontario

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Message Posted: Jul 11, 2014 8:15:44 AM

Up position is natural and better.
MertieMan
Champion Author Lexington

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Message Posted: Jul 11, 2014 7:45:09 AM

Always in the up position unless you are toting a lengthy load of something.
Boyrr
Champion Author Allentown

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Message Posted: Jul 9, 2014 10:42:44 AM

up, always up
Glasman
Champion Author South Carolina

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Message Posted: Jul 8, 2014 8:41:50 AM

the test have already been done:

if you trust Mythbusters, up is better !
twt
Champion Author Virginia Beach

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Message Posted: Jul 8, 2014 5:07:04 AM

Here, it's against the law to drive with the tailgate down.
dontuknowOH
Champion Author Ohio

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Message Posted: Jul 7, 2014 11:53:11 PM

Sorry on a Friday I would go for Up, maybe on Mondays also!
dontuknowOH
Champion Author Ohio

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Message Posted: Jul 6, 2014 5:10:51 AM

Design a boat-tail bed, use a side-gate, you'll get use to it for a 4% savings, and hate the look! Do the M-B head scratch..... Buy a better Brand sleep mattress (Hint!>>> Tail/Head winds Effects)>>> Reality....
GrumpyCat
Champion Author Alabama

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Message Posted: Jul 5, 2014 11:17:24 AM

I agree this is something that needs to be tested because generalizations as to whether tailgate up or tailgate down is too broad and will differ with different trucks.
Jackson126
Champion Author Virginia

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Message Posted: Jul 5, 2014 7:34:59 AM

Up
Houckster
Champion Author Atlanta

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Message Posted: Jan 19, 2014 8:38:12 AM

OLDHILLBILLYAZ writes: ....worrying about gas mileage and driving a pickup is somewhat counter productive.
_____
Another view: I do everything I can to get the most miles per gallon out of my Ford Ranger. Just like any other vehicle, you get a fuel bill payback with driving efficiently. In the 10 years I've had my Ranger, compared to the EPA expectation, I've saved 865 gallons over 55.7K miles, 55% of which are under city conditions. That, in my view is a substantial payback and most certainly not counterproductive.

Not only does a concerted effort to save fuel save money, it also reduces the greenhouse gas emissions that I believe is also important.

As for the tailgate, I always keep it up. I have a tonneau cover that protects the contents of the bed. It was one of the first things I added to my truck so I have very little idea whether it contributes to fuel efficiency or not.

Finally, you have to drive the vehicle that meets your needs and something like a Ford Focus won't do that. You buy the minimum vehicle that meets your needs. That's a pickup for me.

[Edited by: Houckster at 1/19/2014 8:41:23 AM EST]
eyegotgas2
Champion Author British Columbia

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Message Posted: Jan 19, 2014 7:46:03 AM

Most people have stuff in the box anyway or they wouldn't need a truck
hyeglenn
Champion Author Fresno

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Message Posted: Jan 19, 2014 6:19:56 AM

Mine is always up.
Vin63
Champion Author San Bernardino

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Message Posted: Aug 23, 2013 10:10:17 AM

It depends on the velocity and shape of the truck. Generally, at freeway speeds, the tailgate up will reduce drag as an eddy forms behind the cab. At lower speeds, this does not occur.
oldhillbillyAZ
Champion Author Tucson

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Message Posted: Aug 23, 2013 3:37:52 AM

I've did my own tests... Myth Busters is whack....
Besides... Tailgate down... big ugly trailer hitch (with guard) makes reading license plate difficult (for cameras)....

Aside from that....worrying about gas mileage and driving a pickup is somewhat counter productive.

If your worried about gas mileage and your not getting 40MPG or better, you need to go back to school.
Glasman
Champion Author South Carolina

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Message Posted: Aug 14, 2013 9:45:31 PM

if you believe Myth-Busters... up is better !
waynecz
Champion Author Mississippi

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Message Posted: Aug 5, 2013 12:06:30 AM

I have a cover over mine so I am guessing that is even better
MertieMan
Champion Author Lexington

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Message Posted: Aug 4, 2013 9:12:14 AM

This rag has been worn out for years now, LOCK IT!
dassfg
Champion Author Fort Worth

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Message Posted: Aug 4, 2013 8:14:35 AM

Tailgate up is correct. Second best option is a Flow through tailgate.
mybigtruck
Champion Author San Jose

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Message Posted: Aug 4, 2013 12:21:09 AM

I always keep my tailgate up. I hate it bouncing up and then slamming down when I'm driving over rough pavement. Otherwise, one of these days it'll probably snap itself and the cables off.

The only time I have it down is when I need to clean it out in a hurry...ie fly down the freeway. LOL

I have a hard tonneau cover on the back of my box if I'm not hauling stuff, and I consistently get about 0.5mpg better with it on long freeway shots. That was done on 4 different identical 250mile freeway runs with and without it.

0.5mpg might not sound like much, but when I'm averaging 16-17mpg on the freeway, it's about a 3-4% improvement.


[Edited by: mybigtruck at 8/4/2013 12:28:20 AM EST]
OceanArcher
Champion Author Mississippi

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Message Posted: Aug 3, 2013 8:43:13 AM

Keep the tailgate up -- stuff doesn't fall out of the bed quite as fast
RedWings44
Rookie Author Michigan

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Message Posted: Aug 2, 2013 5:51:32 PM

I am not sure that Fox News is the best link to provide however I do know that the Mythbusters did this test a few years ago and found the same thing.

The tailgate up helps the air to create a swirling bubble which allows other air to flow over it. If you put the tailgate down, the bubble disappears and the air comes down on the tailgate producing a great deal of drag. This is especially noticeable on the freeway.
ranger2k
Champion Author St. Louis

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Message Posted: Aug 2, 2013 1:42:31 PM

been driving pickups for thirty years, never noticed the difference, do not own a car.

[Edited by: ranger2k at 8/2/2013 1:43:10 PM EST]
gasandgoAL
Champion Author Alabama

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Message Posted: Jul 30, 2013 6:38:11 AM

up always
FrankLee1
Champion Author Minnesota

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Message Posted: Jul 30, 2013 2:28:14 AM

Gate up; gate down- who cares. The bigger question is, why are you commuting in a truck?
dontuknowOH
Champion Author Ohio

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Message Posted: Jul 29, 2013 10:51:14 PM

Being I have a bed toolbox I believe I get better mileage when the tail-gate is completely removed, maybe its the reduced weight factor of the missing tail-gate, don't know.
skydone7
Sophomore Author Kansas City

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Message Posted: Jul 29, 2013 8:30:44 PM

yep
Maintroll
Champion Author Lexington

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Message Posted: Jul 21, 2013 9:10:05 AM

This post has been around for years and should be locked. Always have the tail gate up unless you are toting a load of something that extends out. In some cities you can receive a citation for a tail gate being down constantly.
Banjoe
Champion Author Winnipeg

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Message Posted: Jul 21, 2013 8:37:27 AM

Seems counter intuitive but perhaps this mean that we should install some kind of tailgate on our cars to improve mileage?
smugutu1234
Champion Author Tallahassee

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Message Posted: Jul 21, 2013 7:49:25 AM

That is the way it was made.
ricebike
Champion Author New Jersey

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Message Posted: Jul 21, 2013 7:45:29 AM

saw that on mythbusters

having a tonneau cover also helps
cdnt48
Rookie Author Minnesota

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Message Posted: Jul 21, 2013 6:04:13 AM

yawn
weddy11
Champion Author Phoenix

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Message Posted: Jul 20, 2013 7:13:29 PM

Keeping it up is the best for gas mileage from what I heard over the years.
BBF_PFS
Champion Author Washington

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Message Posted: Jul 20, 2013 10:11:00 AM

When is the last time you bought a pickup to get better MPG?
Xquzme
Champion Author British Columbia

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Message Posted: Jul 19, 2013 2:40:55 PM

Keep it up....
hyeglenn
Champion Author Fresno

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Message Posted: Jul 19, 2013 11:08:12 AM

I disagree. ..
FrankLee1
Champion Author Minnesota

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Message Posted: Jul 16, 2013 9:38:17 PM

Where did science say that?
GrumpyCat
Champion Author Alabama

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Message Posted: Jul 16, 2013 3:59:09 PM

"The science says that the air will "roll" in the bed and "push" the cab resulting in a net 0 effect on the vehicle's MPG."

Yes but science only says that after doing the wind tunnel tests. Before the wind tunnel tests science claimed tailgate down was best.
RodOrRob
Champion Author Mobile

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Message Posted: Jul 14, 2013 6:30:28 PM

http://dsc.discovery.com/tv-shows/mythbusters/mythbusters-database/driving-tailgate-fuel-consumption.htm

Tailgate UP is best!
Mikeyl
Champion Author Cleveland

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Message Posted: Jul 14, 2013 9:21:46 AM

The science says that the air will "roll" in the bed and "push" the cab resulting in a net 0 effect on the vehicle's MPG.
weddy11
Champion Author Phoenix

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Message Posted: Jul 4, 2013 10:39:10 AM

yes, was told of the same type of test 30 years ago.
ugly46
Champion Author Indiana

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Message Posted: Jul 4, 2013 9:17:58 AM

Up is better
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