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Trailering MPG??

Old 05-11-2008, 06:30 PM
  #21  
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I have a 04 2500 with a duramax pulling a 243 everglades with a hard top 70-75 I get 9mpg at 60 13 mpg . Empty at 70-75 I get 18mpg

The hard top reduces MPG when towing comparied to other boats i have towed
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Old 05-11-2008, 06:34 PM
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Default Re: Trailering MPG??

I actually had the 2006 F 250 and averaged a little better mpg than the new 2008. Only now that i have slowed down a little have i noticed better mpg now. Im not a truck snob just somebody thought they deserved my truck more than i did and stole it while i was working. Anyways....Looking at getting a larger boat 25ft that weighs in around 8 or 9k so i was wondering how much different it would be from my current situation. Doesnt seem like it will change much unless the aerodynamics of the new boat are alot more.
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Old 05-11-2008, 07:08 PM
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I have a 2008 F450 4x4 auto crew cab dually with 4.30 rear. Around town using enough throttle to keep up with traffic from stoplights, I get 13 mpg. At a steady 65 mph on the interstate, it gets 16 mpg empty. Towing a bumper pull toyhauler with 22,600 measured on truck scales, I got 9.5 mpg at 60 mph and 7.5 mpg at 70 mph on a trip from VA to LA and back. The truck's mileage computer and my calculations match exactly, very accurate over multiple tanks.

The mileage is a slightly better than my 2001 F250 super cab 4x4 V10 auto but the towing performance is 100x better, set the cruise and watch the turbos maintain speed. It rarely downshifts, only a couple of times going through the lower Appalachia. The F250 did a surprisingly good job but it worked hard at it, this new truck does the same job without even trying.

I think ULSD has a lot to do with the overall drop in mileage for diesels, even the older trucks are losing a couple of mpg running the new fuel. And the new trucks with their soot burning apparatus are a real treat, thinking about that $4.25/gallon fuel being dumped right into the tailpipe is enough to make a guy cry when the dash says it's time to clean the filter.
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Old 05-11-2008, 07:13 PM
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Default Re: Trailering MPG??

harrelson - 5/11/2008 8:30 PM

I have a 04 2500 with a duramax pulling a 243 everglades with a hard top 70-75 I get 9mpg at 60 13 mpg . Empty at 70-75 I get 18mpg

The hard top reduces MPG when towing comparied to other boats i have towed
Harrelson,
That seems like kinda sucky mileage for a Dmax (empty). 2WD or 4WD? You got big tires on there? Mine is bone stock, tires and all, right down to the A/C Delco air and oil filters.
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Old 05-11-2008, 07:16 PM
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capehaze - 5/11/2008 3:16 PM

Also planned to put a flashing yellow warning light on the stern. Just to check, I called the state police to ask about this... I was told (in a rather unfriendly manner) that since I was not a *commercial* towing vehicle it would be illegal for me to run a yellow flasher! Humm, since I am not making a profit, I should be less safe. Go figure. Think I am going to do it anyway, taking my chances to help prevent a rear end collision, especially at night.
Hey Woody,

Whether we're towing or not, we NEVER go over 55mph. 'Drove from SC to Alaska @ 55mph max. You'll be surprised at how much better your mpg is (12 vs 9 mpg towing, and 17 vs 13 empty) and how much better you feel when you arrive...you never have to worry about the speed limit...never have to worry about whether you can get around someone in time on a 2 lane road, never have to worry about coming up on someone and having to brake cause there's no room to change lanes...I've got over 60,000 miles on my brakes and they show little signs of wear.

I've been doing this for 10 years and have experienced no unfavorable consequences or regrets.

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Old 05-11-2008, 07:20 PM
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ubetrun, mine is a 2002 and I bought it new. I have noticed absolutely NO difference in mpg since ULSD came out. I have 170,000 miles on it and i keep track of my mileage religiously for maint. purposes. Last time I noticed a drop in mileage of about 1-1.5 mpg, I took the truck in for service...had 3 injectors dribbling fuel when hot. New injectors and right back to same old mpg numbers. I do think the ULSD may have been the cause of my sticking injectors though.
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Old 05-11-2008, 07:42 PM
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jeffnick - 5/11/2008 9:16 PM

capehaze - 5/11/2008 3:16 PM

Also planned to put a flashing yellow warning light on the stern. Just to check, I called the state police to ask about this... I was told (in a rather unfriendly manner) that since I was not a *commercial* towing vehicle it would be illegal for me to run a yellow flasher! Humm, since I am not making a profit, I should be less safe. Go figure. Think I am going to do it anyway, taking my chances to help prevent a rear end collision, especially at night.
Hey Woody,

Whether we're towing or not, we NEVER go over 55mph. 'Drove from SC to Alaska @ 55mph max. You'll be surprised at how much better your mpg is (12 vs 9 mpg towing, and 17 vs 13 empty) and how much better you feel when you arrive...you never have to worry about the speed limit...never have to worry about whether you can get around someone in time on a 2 lane road, never have to worry about coming up on someone and having to brake cause there's no room to change lanes...I've got over 60,000 miles on my brakes and they show little signs of wear.

I've been doing this for 10 years and have experienced no unfavorable consequences or regrets.
Be careful going that slow. I got rear-ended last May (almost EXACTLY one year ago) while towing my boat. Blue-bird day, 9:30 Sunday morning in VERY light traffic. Had my cruise set on 72 mph (speed limit 70) and this kid just slammed into the back of my rig. From the damage, the impact, etc, my guess is that he was doing close to 100 mph. That's about a 28 mph impact and he destroyed one motor, hydraulic steering, linkage, cables, some fiberglass damage AND he totaled my trailer... which he never touched. He slammed the bow of the boat up against the winch stanchion so hard, it torqued both aluminum I-beams! Total repair bill, right at $43k! Worst of all, it KILLED my summer for fishing offshore. Now add another 17 mph to that for an impact speed of 45 mph if you're only doing 55 mph and you have a serious impact!! Not saying it will ever happen, 'cause what happened to me was about as crazy a thing as I've ever seen, but I know what it felt like at 28 mph difference in speed... don't want to try a 45 mph impact!!


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Old 05-11-2008, 07:53 PM
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Towed a 20 Mako from FL to MA with a 1999 SuperDuty Powerstoke and averaged 14.5 overall.

D-
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Old 05-12-2008, 03:22 AM
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Default Re: Trailering MPG??

Let me ask this question about towing, seems like I always get different answers on this, but is it ok to tow in overdrive as long as the vehicle is not shifting in and out of overdrive??

I have been told that as long as the tranny does not keep shifting in and out that it is ok but I have others tell me that under no circumstance should you ever tow in overdrive
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Old 05-12-2008, 04:02 AM
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What I did with my 24' CC was to take the windshield off for tailoring, I put in aircraft style cam locks in place of the screws holding the windshield in. I now have a quick disconnect windshield, as my boat has a pretty good size windshield It was just a big wind catch. for tailoring long distances I set the window on the deck in front of the leaning post on top of foam then wrap Saran Wrap around the window and the lean post to keep everything tight. I know this has helped my mileage.
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Old 05-12-2008, 05:15 AM
  #31  
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bradv - 5/11/2008 1:52 PM

I have a 2008 F 350 Diesel Long Bed Crew cab. Running 65 mph on the highway with no load i can get 21 mpg. Running 65 mph with 2000lbs in the bed i can still get around 19 or 20 mpg. However dragging my 21ft boat i get around 12mpg. I know it has more drag and the whole package probably weighs in between 5 and 6k but what is anyone else seeing when trailering?? Does a heavier boat change the efficiency as much as the aerodynamics? Just curious.
Is this calculated by hand or by the liar-meter in the truck? Does your truck got all the emission equipment on it? I have yet to see any 6.4 powered truck get over 18 mpg.

I have a 2000 2wd F350 with a 7.3. I get 16-18 in town unloaded, 20-21 highway keeping the tach under 2k. Towing gets me 14-15 with just the boat. 12-13 with the boat and camper.
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Old 05-12-2008, 05:27 AM
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Default RE: Trailering MPG??

"is it ok to tow in overdrive as long as the vehicle is not shifting in and out of overdrive?? "

Definately. As long as it is not hunting for a lower gear frequently. I tow with a 99 GMC Yukon, 3000lb boat and the truck packed to the gills with food, adult beverages and much more for a 2 week stint every summer and can count on my one hand the number of times the truck asks for a lower gear over 400 miles. Not many hills here in northern lower Michigan. The key is to NOT use the cruise control on this particular truck. If I use the brainless default cruise control then the transmission is hunting for a lower gear more than I am comfortable with.
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Old 05-12-2008, 07:11 AM
  #33  
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Default RE: Trailering MPG??

nope not by hand or liar-meter. Just telling you what ive been getting on the highway.
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Old 05-12-2008, 07:32 AM
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bradv - 5/12/2008 6:11 AM

nope not by hand or liar-meter. Just telling you what ive been getting on the highway.
Then how do you calculate it.
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Old 05-12-2008, 07:36 AM
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Distance driven divided gallons on fill up. Also the truck has avg. mpg that you can reset anytime youd like. been getting close to 650 miles when putting 34 gallons in when traveling alot on the highway and some around town for about 19 mpg overall.
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Old 05-12-2008, 08:24 AM
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My 2004 Toyota Tundra, 4.7L, 3.93 rear end, 6,000 lb boat/trailer gets me between 6.5 and 8.5 mpg. Regular driving gets an average of 16 mpg.

I tow with overdrive on, has not been a problem at all in the 3,000 miles I've been towing the boat for now. In town/off highway, I turn O/D off. I cruise at 65 mph at around 2,500 rpm, no gear hunting out of my 4 speed auto at all.
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Old 05-12-2008, 08:51 AM
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I run dodge 2004.5,LWB with the 5.9L cummins.I get anywere from 19-22mpg not towing and towing my bayboat which weights around 3100lbs total.Now when I tow my 28' cc Baja/trailer which weights in at 8750lbs loaded,I get 15 mpg at 75 mph.Wind drag is big time on this.Never tryed a slower tow speed,but will come thursday with the price of diesel is at $4.29 a gallon.OUCH! And then gas at $3.69 x 200 gallons,guess I will have to take out a home loan.LOL
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Old 05-12-2008, 10:33 AM
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2005 F350 4x4 PowerStroke. About 16.5 mpg over the life of the truck so far (34000 miles). About 18/19 mpg on the hwy empty @ 70 mph. About 11-12 mpg towing just under 12k boat & trailer (hardtop & curtains, lots of windage), towing at 60-62 mph. Axles are 3.73 & auto trans.
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Old 05-12-2008, 10:41 AM
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Nissan Titan Crew cab with big tow - towing 2400 Vector on Loadrite Galv steel roller trailer I averaged 7.5-8 mpg. Towing 2500vx with twins on Venture aluminum bunk trailer I get 9.5-10. 2500 Sits considerably lower thus creating less drag. Also aluminum trailer make huge differnce in vibration and weights almost 1000# less.
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Old 05-12-2008, 09:15 PM
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OK, one (two) more. My dad towed a 251 PRO-LINE walk with original trailer from Alabama to BC with a 94 Starcraft conversion Suburban with tow tranny factory package work. Est 6500 lbs. 350 TBI old tech injection. Original trailer with new bearings/breaks. 14 mpg gas for 2500 miles 55 to 60 with mountains.
Next boat I figured I would be smart and buy a vehicle too.
2003 Aquasport cc. TT New trailer . Bought thru THT vendors too. (great trailer) 2002 Ford E$xpidetion big block OHC (Sold the leather lined POS before the recent gas rise) but 9 MPG was the best average economy with little extra power. . Same route ,and dad bitched he could not even sleep in the boat..(great dad, he slept in the PRO LINE 3 X with the dog even though I told him to take a good hotel ..70 years old and still alert and frugal !)
5300 lb . scaled boat and trailer. Way less windage than the walk too. So it all depends on engineering. 50% is a big difference with reciepts to prove.
Towing mileage sucks no matter what.
A further lesson from both the above. Dad said new trailer brakes saved him twice on both rides. Thank God . Do not cheap out on stopping power or tires.
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