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Do you draft semis? #4667535
02/16/18 08:21 AM
02/16/18 08:21 AM
Joined: Jan 2017
Posts: 278
Iowa
Iowegian Offline OP
Iowegian  Offline OP
Joined: Jan 2017
Posts: 278
Iowa
Do you draft semis?
How close?
Mpg savings you get?

https://www.treehugger.com/cars/drafting-behind-trucks-does-it-work.html

So I tried it a little today on the interstate. 20 mph head wind.
My instantaneous mileage readout showed an increase from 18 mpg to about 23 mpg at 70 mph.
2011 equinox.
Not sure how close I was but certainly further than 100 feet.

Semi drivers? Care to opine? whistle

Last edited by Iowegian; 02/16/18 08:32 AM.

2011 Equinox, 2.4l
2009 Sienna, 3.5l
Re: Do you draft semis? [Re: Iowegian] #4667538
02/16/18 08:26 AM
02/16/18 08:26 AM
Joined: Sep 2010
Posts: 7,470
Texas & Global
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,470
Texas & Global
Originally Posted By: Iowegian
Do you draft semis?
How close?
Mpg savings you get?

https://www.treehugger.com/cars/drafting-behind-trucks-does-it-work.html

So I tried it a little tosay on the interstate. 20 mph head wind.
My instantaneous mileage readout showed an increase from 18 mpg to about 23 mpg at 70 mph.
2011 equinox.
Not sure how close I was but certainly further than 100 feet.

Semi drivers? Care to opine? whistle


Nope but many moons ago my brother had a VW van while attending the University of Texas by the time it got a bit hilly heading for Austin you had to draft a truck to do 60 mph wink


2018 Chevy 1500 Z71 4WD
2017 Chevy Tahoe LT 4WD
2014 Fusion Hybrid Titanium
2013 Cruze LTZ - RS Turbo
Re: Do you draft semis? [Re: Iowegian] #4667541
02/16/18 08:28 AM
02/16/18 08:28 AM
Joined: Jul 2012
Posts: 209
MD
onemig Offline
onemig  Offline
Joined: Jul 2012
Posts: 209
MD
I don't to avoid rock chips.


2014 Subaru Forester XT Touring w/ Eyesight, 80K miles - Wife's

2017 GTI S DSG 4 Dr. HB, 5K miles - Mine
Re: Do you draft semis? [Re: Iowegian] #4667548
02/16/18 08:33 AM
02/16/18 08:33 AM
Joined: Jan 2013
Posts: 2,065
Texas
WyrTwister Offline
WyrTwister  Offline
Joined: Jan 2013
Posts: 2,065
Texas
No .


Wyr
God bless
Re: Do you draft semis? [Re: onemig] #4667550
02/16/18 08:33 AM
02/16/18 08:33 AM
Joined: Jan 2017
Posts: 278
Iowa
Iowegian Offline OP
Iowegian  Offline OP
Joined: Jan 2017
Posts: 278
Iowa
Originally Posted By: onemig
I don't to avoid rock chips.

Good point


2011 Equinox, 2.4l
2009 Sienna, 3.5l
Re: Do you draft semis? [Re: Iowegian] #4667551
02/16/18 08:34 AM
02/16/18 08:34 AM
Joined: Dec 2009
Posts: 762
Battle Creek, MI
SVTCobra Offline
SVTCobra  Offline
Joined: Dec 2009
Posts: 762
Battle Creek, MI
I don't have a digital read out of MPG on my truck but when towing big wind drag items like hay I can tell a huge difference. Usually my F-150 doesn't have the power to tow any high profile items like hay at 60 mph in overdrive.
When an 18 wheeler passes me, usually my truck can gain 5 mph in OD, so I know it helps with wind load a lot, but usually the eddies coming from the back the truck makes the truck feels unstable so I usually don't follow close enough to gain any real benefit.


Think twice, speak once.
Re: Do you draft semis? [Re: Iowegian] #4667552
02/16/18 08:34 AM
02/16/18 08:34 AM
Joined: Aug 2011
Posts: 3,384
Chicago,IL,USA
pandus13 Online content
pandus13  Online Content
Joined: Aug 2011
Posts: 3,384
Chicago,IL,USA
It only benefited me twice:
1. down pouring rain, low visibility, really late at night. I got behind him (free carwash), but positioned myself not to blind him. He had a higher seating position, so better visibility than tired me.
2. a porkie carrier while driving trough Smokies and ATL. He passed everybody at 70+, no matter traffic or going up the mountain. or curves.
Of course in the morning guess who had a brand new crack growing in the front windshield?

So for the rest I give them the respect especially since they could kick pebbles on the road pretty quick and hard.
Also they could be tired from driving for who knows how long.
But as a group, tire truck/semi drivers beat 4-wheelers for consistency and courtesy in traffic.

Be safe out there.


16 Golf SportWagen
13 Mazda5
08 Yaris
04 Elantra
95 accent
95 mystique
97 concorde
Re: Do you draft semis? [Re: Iowegian] #4667555
02/16/18 08:36 AM
02/16/18 08:36 AM
Joined: Jan 2017
Posts: 278
Iowa
Iowegian Offline OP
Iowegian  Offline OP
Joined: Jan 2017
Posts: 278
Iowa
I think I will continue to try this... At a safe distance. Considering my Equinox is not the most aerodynamic, the effect will be much greater.


2011 Equinox, 2.4l
2009 Sienna, 3.5l
Re: Do you draft semis? [Re: Iowegian] #4667556
02/16/18 08:37 AM
02/16/18 08:37 AM
Joined: Oct 2002
Posts: 2,966
North TX
RTexasF Offline
RTexasF  Offline
Joined: Oct 2002
Posts: 2,966
North TX
Nope, not on a bet.

Re: Do you draft semis? [Re: Iowegian] #4667558
02/16/18 08:37 AM
02/16/18 08:37 AM
Joined: Sep 2010
Posts: 7,470
Texas & Global
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,470
Texas & Global
Originally Posted By: Iowegian
Originally Posted By: onemig
I don't to avoid rock chips.

Good point

At only 7K on SUV already blessed by a gravel hauler booked for a resin job next week


2018 Chevy 1500 Z71 4WD
2017 Chevy Tahoe LT 4WD
2014 Fusion Hybrid Titanium
2013 Cruze LTZ - RS Turbo
Re: Do you draft semis? [Re: onemig] #4667563
02/16/18 08:40 AM
02/16/18 08:40 AM
Joined: Aug 2011
Posts: 3,384
Chicago,IL,USA
pandus13 Online content
pandus13  Online Content
Joined: Aug 2011
Posts: 3,384
Chicago,IL,USA
Originally Posted By: onemig
I don't to avoid rock chips.

^^^ this also.
Mazda5 paint is really brittle.


16 Golf SportWagen
13 Mazda5
08 Yaris
04 Elantra
95 accent
95 mystique
97 concorde
Re: Do you draft semis? [Re: onemig] #4667567
02/16/18 08:41 AM
02/16/18 08:41 AM
Joined: Mar 2009
Posts: 212
PA USA
rustypigeon Offline
rustypigeon  Offline
Joined: Mar 2009
Posts: 212
PA USA
Originally Posted By: onemig
I don't to avoid rock chips.


I keep a good distance from vehicles ahead of me not only for safety, but rock chips.

There is a clear and definite difference in the amount of rock chips in the vehicles I drive, compared to the vehicles my wife drives. She constantly tailgates and her vehicle looks like someone sandblasted the front.


1994 Toyota Pickup 202,000mi
1999 Mazda Protege 220,000mi
2000 BMW 323i 126,000mi
2005 Toyota Highlander 180,000mi
Re: Do you draft semis? [Re: rustypigeon] #4667573
02/16/18 08:47 AM
02/16/18 08:47 AM
Joined: Jan 2017
Posts: 278
Iowa
Iowegian Offline OP
Iowegian  Offline OP
Joined: Jan 2017
Posts: 278
Iowa
Originally Posted By: rustypigeon
Originally Posted By: onemig
I don't to avoid rock chips.


I keep a good distance from vehicles ahead of me not only for safety, but rock chips.

There is a clear and definite difference in the amount of rock chips in the vehicles I drive, compared to the vehicles my wife drives. She constantly tailgates and her vehicle looks like someone sandblasted the front.

I don't tailgate....I pass em! grin


2011 Equinox, 2.4l
2009 Sienna, 3.5l
Re: Do you draft semis? [Re: Iowegian] #4667575
02/16/18 08:48 AM
02/16/18 08:48 AM
Joined: Aug 2015
Posts: 2,911
NC
BigD1 Offline
BigD1  Offline
Joined: Aug 2015
Posts: 2,911
NC
If you like living, stay away from trucks, and pass them quickly as possible. The trailer tires blow up lots. I know because I blew up my fair share of them when I was driving. Blew one tractor drive tire, and not one steer tire. Recaps are used on the trailer.


1992 Toyota Pickup--Harvest King Premium 10W-30--Fram PH3614
Re: Do you draft semis? [Re: Iowegian] #4667580
02/16/18 08:51 AM
02/16/18 08:51 AM
Joined: Apr 2003
Posts: 1,369
Nowhere NM
Smoky14 Offline
Smoky14  Offline
Joined: Apr 2003
Posts: 1,369
Nowhere NM
Was almost out of gas and out of money returning to base from leave riding my motorcycle, latched on to a rig and got over 70MPG which got me out of trouble with my uncle Sam. The driver knew I was there and kept me out of trouble, but I don't recommend it for fun.

Smoky


99 Acura 2.3CL 5speed MT
12 Ford Fusion 2.5S 6speed MT
05 Suzuki Bandit 1200.
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