Grit dog
Black Diamond, WA
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Bionic Man wrote:@Cummins12v98, do you really notice any difference in MPG towing tandem with that little trailer? I tow my 18’, around 3500 pound Ranger boat tandem fairly often, and I don’t notice any difference in MPG vs just one trailer.
I’d believe it. Never pulled doubles but when we had our old truck and TC, mileage was not much worse towing a 6klb boat. Maybe 1 mpg less but I don’t ever really track fuel mileage.
And the combo handled better dragging an “anchor”.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold
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4x4ord
Alberta
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Joined: 12/23/2010
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Retired JSO wrote:18 Ford F350 diesel DRW 4:30 gear, 9 towing 66-70. 14 no trailer 72-75. If you are worried about fuel mileage, you need a different hobby.
The more fuel I use the more I’m going to be concerned about fuel mileage. Not much point in a cyclist being overly concerned about his gas mileage.
2022 F350 SRW Platinum short box 4x4.
B&W Companion
2008 Citation Platinum XL 34.5
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MFL
Midwest
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Joined: 11/28/2012
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Bionic Man wrote:@Cummins12v98, do you really notice any difference in MPG towing tandem with that little trailer? I tow my 18’, around 3500 pound Ranger boat tandem fairly often, and I don’t notice any difference in MPG vs just one trailer.
Can't answer as to 12Vs mileage, but in my case, when towing double, with similar wt second trailer with motorcycles, mileage does not change. I do drop speed from 65, to 60, when double towing, and is likely the reason for no change.
Jerry
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Mike in DE
Delaware
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Joined: 12/30/2022
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Updated DCI vs Manual MPG - 2632 total miles, Ave DCI - 14.2 Ave Manual - 14.17. I'm still trusting the DCI. Let the beatings begin!! ![[emoticon]](https://forums.goodsamclub.com/sharedcontent/cfb/images/wink.gif "wink")
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Grit dog
Black Diamond, WA
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No beatings here. Again, I watch fuel economy about as much as I watch what I eat…(in the Mc Ds drive thru atm). But I have hand calculated a few times on a few vehicles. Usually when bored on a road trip and never been way out of whack like some claim. Although I know how to properly adjust for tire size etc.
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StirCrazy
Kamloops, BC, Canada
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Joined: 07/16/2003
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Grit dog wrote:No beatings here. Again, I watch fuel economy about as much as I watch what I eat…(in the Mc Ds drive thru atm). But I have hand calculated a few times on a few vehicles. Usually when bored on a road trip and never been way out of whack like some claim. Although I know how to properly adjust for tire size etc.
haha I just worry about it because I hate stopping for diesel when your towing a 40 foot 5th ![[emoticon]](https://forums.goodsamclub.com/sharedcontent/cfb/images/biggrin.gif "biggrin") better milage I can get the easier it is to get it set up then run to town fill the truck, grab the groceries the wife forgot to pack and so on haha.
2014 F350 6.7 Platinum
2016 Cougar 330RBK
1991 Slumberqueen WS100
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Cummins12V98
on the road
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Bionic Man wrote:@Cummins12v98, do you really notice any difference in MPG towing tandem with that little trailer? I tow my 18’, around 3500 pound Ranger boat tandem fairly often, and I don’t notice any difference in MPG vs just one trailer.
YES a slight drop like .5 or less mpg.
2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"
"HeavyWeight" B&W RVK3600
2016 MobileSuites 39TKSB3 highly "Elited" In the stable
2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD
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Cummins12V98
on the road
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GS that's a BEAUTIFUL Truck. I bet you love the color except for it looking dirty well before your white one did.
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dieseltruckdriver
Black Hills of SD
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Joined: 08/24/2005
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It's not the weight, it's the wind that will have the largest effect on your mileage.
It doesn't matter if you hand calculate or not on a no wind day, what matters more is how tall is your trailer. Notice I didn't say how long is your trailer.
Source: 17 years as a truck driver grossing 120,000 lbs in a previous life.
2000 F-250 7.3 Powerstroke
2018 Arctic Fox 27-5L
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BackOfThePack
Fort Worth
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dieseltruckdriver wrote:It's not the weight, it's the wind that will have the largest effect on your mileage.
It doesn't matter if you hand calculate or not on a no wind day, what matters more is how tall is your trailer. Notice I didn't say how long is your trailer.
Source: 17 years as a truck driver grossing 120,000 lbs in a previous life.
Yes.
With a TT it’s generally a 40% penalty at 60-mph versus the TV loaded the exact same way, solo. Above 50% time to check both vehicles for alignment, brake drag and wheel bearing pre-set. But you won’t know “true” unless you test. Solo, load approximated for camping, then hitched, over same course. Otherwise it takes several thousand miles of consistency.
Height does kill MPG. 6’ longer is better than 1’ higher.
Measure the floor height from ground. “Lower” in that case is the first condition. Side-outs are not one’s friends as then it must clear suspension. Turbulence UNDER trailer magnifies that BETWEEN TV & TT.
See pics of HOLIDAY RAMBLER for best made conventional (non-aero) from the 1970s.
As to fuel mileage otherwise, 62-mph Interstate and below posted on two lanes.
Manage others around you. 1973 or 2023 doesn’t change this.
Cruise control, no lane-changing and avoidance of brakes & throttle. Steady rpm. Anything above 65 isn’t economical. 62 makes it easier for trucks to get around. Lights on, mirrors which converge in image 100’ back. Cancel cruise, maintain lane center and drift down to 55 if they’re slow. Re-engage once they’re 7-8 stripes ahead.
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2004 555 CTD QC LB NV-5600
1990 35’ Silver Streak
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