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05-18-2012, 01:39 PM
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#1
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Senior Member
Join Date: Aug 2010
Posts: 276
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gas mileage ?
My question is we currently tow a 23 B so it is light weight. We are considering upgrading to a larger TT. Will a heavier Tt reduce our gas mileage when towing or is the gas mileage just affected by the wind drag anyway?
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]2010 Jayco 23 B
2012 zinger
2013 elkridge
2012 f250 diesel
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05-18-2012, 01:46 PM
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#2
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Senior Member
Join Date: Mar 2012
Location: Northern Cal
Posts: 409
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Weight and wind resistance both contribute to you gas mileage.
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2012 Jayco Eagle 321RLTS
2008 Dodge Cummins 3500 DW Crew Cab 4x4 6 speed Auto, Exhaust Brake
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05-18-2012, 01:46 PM
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#3
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Senior Member
Join Date: Apr 2011
Location: Southeast, NY
Posts: 1,113
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A heavier TT will cause more work for the TV especially when going up hill, so assuming that the frontal area is similar, the heavier TT will use more fuel than a lighter unit.
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Karl - Southeast, NY
2020 377 RLBH
2018 Ram 3500 Mega Limited 6.7L Cummins w/ Aisin
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05-18-2012, 02:25 PM
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#4
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Senior Member
Join Date: Aug 2010
Location: Fairbury,Nebraska
Posts: 241
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Our 308fbs is heavier than our old Terry was but actually pulls easier because of the shape of the front.
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Alan, Kim, & Kaitlin
2012 Ram 1500 Crew Cab
6 Speed Auto 3:92 Posi
Rambox Hemi Hard Loaded
Airlift Bags 20" Goodyears
2004 Jayco Eagle 308 FBs
Sold trailer starting search
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05-18-2012, 03:51 PM
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#5
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Senior Member
Join Date: Nov 2010
Location: Huntsville, AL
Posts: 375
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A heavier TT will use more fuel, but the mpg is impacted by the wind resistance much more by the wind resistance than by the weight. So your mpg will suffer with the heavier TT, but likely not by much unless you are in some very hilly terrain.
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2011 Ford F-350
2020 Jayco Eagle 355 MBQS
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05-18-2012, 10:11 PM
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#6
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Senior Member
Join Date: Jun 2010
Location: Saskatoon Sask Canada
Posts: 10,726
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the faster you drive the worse your mileage will be too...
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Seann
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 900watts of solar, Lithium batteries (400amp hour), 2000 watt (4000 surge) whole house inverter.
145days /2023 2022/151 2021[/COLOR]
93/2020,157/2019219/2018 206/2017,215/2016, 211/2015, 196/14, 247/13, 193/12
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05-18-2012, 11:16 PM
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#7
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Senior Member
Join Date: Aug 2011
Location: Manitoba Canada
Posts: 553
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The more "stuff" your wife crams into the trailer.. The worse your mileage will be.
Guess how I know about this. 
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05-19-2012, 10:21 PM
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#8
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Senior Member
Join Date: Mar 2012
Location: Friendswood, TX.
Posts: 163
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Heavier TT gets better gas mileage when going down hill
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2007 Toyota Tundra Crewmax LTD 4x4 5.7l w/4.3r 381 hp and 401 lb-ft of torque
2012 Jayco 32BHDS
Me, Wife and 3 kiddos
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05-20-2012, 10:02 AM
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#9
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Senior Member
Join Date: Aug 2011
Location: Indianapolis
Posts: 371
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When we bought this new jayco, I was thinking that my mileage would go in the toilet. This trailer weights 2000 lbs more than my last one. I was hopping I could get the same fuel mileage as before. So I thought maybe if I slow down a bit I could get the same mileage. I slowed from 70mph to 65 mph towing. My mileage went from 10 to 11.5. I was very happy. The only thing I could think, besides the speed was that this trailer has smooth fiberglass siding, a smooth front end cap, and a enclosed bottom. So there is a lot of different things that contribute to mpg.
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05-20-2012, 11:21 AM
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#10
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Senior Member
Join Date: Aug 2009
Location: Dallas, Texas
Posts: 788
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Be careful, most trailer tires are rated for a maximum speed of 65 mph. 
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Russell
'13 Excel Winslow 34IKE
'12 GMC Sierra 3500HD
Previous RV's: '03 MobileScout Titan 29DBS; '01 Sunnybrook Lite 2708 SLE; '99 Coleman Utah
Previous TV's: '02 Chevy Suburban 2500 8.1 4.10; '99 Chevy Express 1500 5.7
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05-20-2012, 11:26 AM
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#11
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Senior Member
Join Date: Aug 2009
Location: Dallas, Texas
Posts: 788
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Quote:
Originally Posted by Preston
X2
I never exceed 60 mph when towing.
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It's hard to keep the Duramax under 65 mph. 
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Russell
'13 Excel Winslow 34IKE
'12 GMC Sierra 3500HD
Previous RV's: '03 MobileScout Titan 29DBS; '01 Sunnybrook Lite 2708 SLE; '99 Coleman Utah
Previous TV's: '02 Chevy Suburban 2500 8.1 4.10; '99 Chevy Express 1500 5.7
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05-20-2012, 11:27 AM
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#12
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Senior Member
Join Date: Mar 2012
Location: Friendswood, TX.
Posts: 163
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Quote:
Originally Posted by drfife
Be careful, most trailer tires are rated for a maximum speed of 65 mph. |
X2
I never exceed 60 mph when towing.
__________________
2007 Toyota Tundra Crewmax LTD 4x4 5.7l w/4.3r 381 hp and 401 lb-ft of torque
2012 Jayco 32BHDS
Me, Wife and 3 kiddos
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05-21-2012, 02:40 PM
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#13
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Senior Member
Join Date: Sep 2011
Location: Luray, VA (central Shenandoah Valley of VA)
Posts: 1,430
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No offense intended, but when one of your trailer tires blows at 70mph, it WILL slow that duramax down a lot, and cause you a lot of grief in the process. I second and third the rule of thumb to keep your speed max at 65, and 60 is better.
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2003 Ford F-350 V-10 Crew Cab 4WD Long Bed
2004 Jayco Designer Medallion 29 RLTS 5th wheel
Bill, Gayle, Teddy (Jack Russell terrier), and Honey (Beagle)
Retired at last !
Nothing is foolproof to a sufficiently talented fool.
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05-21-2012, 04:24 PM
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#14
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Senior Member
Join Date: Nov 2010
Location: Pahrump
Posts: 4,037
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This question comes up on one site or another frequently, and the bottom line consensus as I read it, and from personal experiance, it's wind resistance by far that determines mileage. I've towed 5 and 10k pounds with the same truck, one ten feet hight the other 11. Mileage on the lighter one was just about 1 mpg better. And I'd attribute most of that to it being a foot or more shorter.
Also, my cousin bought a Honda Ridgeline and pulled a small, lightweight TT thousands of miles, coast to coast and back. Ten mpg. Maybe engines are just supposed to give you ten mpg if you pull. Who knows? Just my thought.
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'11 Eagle 320RLDS
'02 F350 PSD Dually 4WD
DW's Ride, '13 Expedition
'14 Denali XL
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05-21-2012, 05:26 PM
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#15
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Senior Member
Join Date: Mar 2012
Location: Friendswood, TX.
Posts: 163
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Quote:
Originally Posted by tinlizzie23
No offense intended, but when one of your trailer tires blows at 70mph, it WILL slow that duramax down a lot, and cause you a lot of grief in the process. I second and third the rule of thumb to keep your speed max at 65, and 60 is better.
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I believe I had seen in an earlier post that he has replaced his trailer tires with higher speed rated ones.
__________________
2007 Toyota Tundra Crewmax LTD 4x4 5.7l w/4.3r 381 hp and 401 lb-ft of torque
2012 Jayco 32BHDS
Me, Wife and 3 kiddos
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05-21-2012, 05:52 PM
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#16
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Senior Member
Join Date: Aug 2011
Location: Indianapolis
Posts: 371
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Quote:
Originally Posted by drfife
Be careful, most trailer tires are rated for a maximum speed of 65 mph. |
Your right, but Goodyear is not going to rate a tire good to 65 knowing it will self destruct at 70. I towed my last trailer at 70. I never had a blow out. I got 8 years out of my goodyear marathons before I started to replace them. I had 2 replaced with a sidewall bulge that Goodyear prorated them. I then just replaced the other 2 just because. I tow my trailers at least 3,000 miles a year. I never leave the driveway without checking the pressures first, and I would always check them at every stop.
I tow my new eagle at 65 and your right the duramax grumbles about going that slow.:hihi:
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05-21-2012, 06:47 PM
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#17
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Senior Member
Join Date: Jul 2011
Location: St. Augustine
Posts: 132
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All ST trailer tires are rated for 65 mph max. LT's are rated higher.
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2014 Jayco Jay Flight 33RLDS travel trailer, now seasonal in the Adirondacks, Honda EU3000 generator.
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