MPG Halved by Boler - Page 3 - Fiberglass RV


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Old 05-04-2012, 11:29 PM   #29
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Name: Dave
Trailer: Bigfoot 25 RB and Bigfoot 21RB
British Columbia
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Take a look at your trailer tires. I have no recommendations to make as to brand, but I an say that just changing tires on my ol' Boler 1700 resulted in a real difference in MPG and in the effort my tug had to put into pulling it.
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Old 05-06-2012, 07:09 PM   #30
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Trailer: 1972 boler American and 1979 Trillium 4500
Ontario
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That was my thought Dave. Tire wear would show axle alignment problems and or underinflation.
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Old 05-06-2012, 08:06 PM   #31
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Quote:
Originally Posted by honda03842 View Post
When the thing being towed has a frontal area smaller than the frontal area of the tow vehicle it has much less of an effect on mileage.
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Originally Posted by Roy in TO View Post
Tire wear would show axle alignment problems and or under-inflation.
I have 2 trailers as seen in my registry; a Fiber Stream and a Compact Jr.

I had the "Jr." first and because it is narrow and the roof lowers for travel it is almost equal in height and width to my Honda Odyssey. The drop in fuel economy when towing was only 2-3 mpg from not towing.

Conversely, the 'Stream has been lifted due to "flipping" the axle and adding a sistered-in frame reinforcement making it 7" taller than when it left the factory, and it towers over the Odyssey. Driving at a constant 55 mph the mileage can vary from 13-17 mpg and the Odyssey gets 22-23 mpg when not towing. The #1 thing I do is make sure my tires are fully inflated for the best mpg every time I tow.
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Old 05-06-2012, 09:07 PM   #32
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Name: Borden and Carole
Trailer: Boler 1978 17' 4" Earlton Ont Model
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We just took our new Boler on her maiden voyage and were shocked to see the MPG meter on our '05 Caravan reading 11-15, where it would normally be 24-27.

Last summer I towed a utility trailer which weighed roughly the same, but was about 3 feet shorter, and it had little effect maybe 2 or 3 MPG.

This means it's entirely a problem of aerodynamics. Really, really bad aerodynamics.

I really hope there are solutions to this, because otherwise we'll probably have to give up the dream and sell the Boler...
Ours dropped from 5.7L per 100km / 43.6 us mpg or 49 mpg ca
Range of 9L per 100km / 27.6 us mpg or 31 mpg ca too 9.5L 26 us mpg or 29 mpg ca and can be less depending on hills and head wind.

We push a lot of air
at 8'1" high and 7' 11 1/2" wide; lucky it is rounded and light weight
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Old 05-06-2012, 09:28 PM   #33
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Name: Tim
Trailer: Scamp 16' Deluxe side bath
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mpg

We tow a 16' scamp with a 2005 dodge caravan 3.8 v6. Normally 25 mpg highway........ towing 16mpg....no wind.
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Old 05-06-2012, 11:44 PM   #34
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I tow with a honda element and barely notice a difference as they are nearly the same height!
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Old 05-07-2012, 01:41 PM   #35
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Name: john
Trailer: scamp 13
Michigan
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hmm will be intersting to pay attention to others and see what they show.
first the obvious. tug tuned up correctly? your mechanic can also reset you computer for better towing parameters. if needed.
are you towing in overdrive? surprisingly, that might work against you.
of course proper tire inflation.
attitude of trailer? nose high, low?
oh,,,and drive like your drivers ed teacher told you,,,like you have an egg under your foot.

and of course,,, didn't leave the dog tied to the rear bumper? though that might only effect the mpg of huge station wagons....

(obscure vacation movie reference.)
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Old 05-07-2012, 01:48 PM   #36
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Trailer: 77 Scamp 13
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....are you towing in overdrive? surprisingly, that might work against you......

and of course,,, didn't leave the dog tied to the rear bumper? though that might only effect the mpg of huge station wagons....

(obscure vacation movie reference.)
Very bad to tow in overdrive with an automatic. The transmission will shift into and out of overdrive constantly. Will fry your transmission, to the point you can smell burnt on your dipstick. Won't do you gas milage any good either. Either use OD/off switch or manually put in D3 not D.

Obuscure nothing! Classic reference, clear sign of a refined and educated poster
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Old 05-07-2012, 04:32 PM   #37
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We have a '01 Town and Country with AWD and the 3.8. We get 21.8 normally on the highway and we get about 13-14 towing our Scamp. With a good headwind we can get in to the 11's. I tow at around 65-70 in gear 3, not Drive.
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Old 05-07-2012, 08:38 PM   #38
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Trailer: Scamp 16' Deluxe side bath
Minnesota
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overdrive

Tires inflated properly. Recently tuned up engine. I'll tow in overdrive only if there is no constant shifting involved but only at speeds in excess of 65 mph. Hills and head winds or lower speeds and I've got her in the 3 position. I'm happy with my 16mpg performance though, haven't experimented with the attitude adjustment.
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Old 05-07-2012, 09:02 PM   #39
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Trailer: 2006 Scamp 13' towed with a 2005 Dodge Dakota 4.7l Magnum W/full tow package (over kill)
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Tires inflated properly. Recently tuned up engine. I'll tow in overdrive only if there is no constant shifting involved but only at speeds in excess of 65 mph. Hills and head winds or lower speeds and I've got her in the 3 position. I'm happy with my 16mpg performance though, haven't experimented with the attitude adjustment.

Now that could be a problem. Towing at excessive speeds greatly increases the chances of sway, tire failure. and driver fatigue.

Slow down and let us all live.
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Old 05-07-2012, 09:18 PM   #40
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Name: Russ
Trailer: Scamp 16' side dinette, Airstream Safari 19'
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Originally Posted by john warren View Post
hmm will be intersting to pay attention to others and see what they show.
first the obvious. tug tuned up correctly? your mechanic can also reset you computer for better towing parameters. if needed.
are you towing in overdrive? surprisingly, that might work against you.
of course proper tire inflation.
attitude of trailer? nose high, low?
oh,,,and drive like your drivers ed teacher told you,,,like you have an egg under your foot.

and of course,,, didn't leave the dog tied to the rear bumper? though that might only effect the mpg of huge station wagons....

(obscure vacation movie reference.)
John,
The mother in law on the roof rack costs a couple of MPG as well.
Russ
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Old 05-07-2012, 09:37 PM   #41
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Name: Jesse
Trailer: 1984 Scamp 13'
Maryland
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Originally Posted by Rene
There are not many trailers lighter than a 1300 and wind resistance is not any greater than most other trailers either. I think your fuel economy is rather normal. I have a 1700 and tow with a V6 1/2 ton pickup that normally gets 25 mpg highway cruising at 60 when not towing. Towing mileage at 55-60 drops to a measly 12-15 mpg. I am a cheepskate and I FEEL every drop of gas I burn. I am a weekend camper with a two week holiday thrown in as well so I have accepted the costs in the short term. I would like to do some longer trips someday so I am saving for a new (to me) tow vehicle with a diesel engine. This could save me some money on fuel over the long haul. The economics of diesel would not be so good with a new vehicle on relatively short trips. I think the reason I get such poor mileage is that the towing weight is right at towing capacity of the pickup. Also the small block V6 4.3l has only 260 foot pounds of torque and to get that the engine needs to be at 2800 rpm. I have to tow in 4th gear because overdrive will not allow the engine to turn over any faster than 2000 rpm. There is little torque at 2000rpm. In 4th gear I have to get the engine up to 3000 rpm in order to cruise at 60 mph. Not a very efficient setup but it will do for now.
This really surprises me. My previous TV was a Toyota/Scion xD, which is a SUBcompact with a 1.8 liter 128 horsepower engine. The following picture is from our trip to the Poconos (PA), where highway speeds were 60-62 MPH. Even with the bikes on the roof and the Scamp on the back, we averaged 24 MPG. That was 100% towing. In 5th gear (top gear) all the time, except where I had to downshift to 4th to maintain highway speed on hills. Non-towing mileage was usually about 35 MPG on the highway. Oh, and that's with the recommended 20 PSI in the trailer tires (okay, Scamp actually recommends 15 PSI).


I have only towed the scamp a few times with the Outback, but it seems to run around 23 MPG.
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Old 05-07-2012, 09:47 PM   #42
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Name: Logan
Trailer: 1976 Scamp 13'
Wisconsin
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Also the small block V6 4.3l has only 260 foot pounds of torque and to get that the engine needs to be at 2800 rpm. I have to tow in 4th gear because overdrive will not allow the engine to turn over any faster than 2000 rpm. There is little torque at 2000rpm. In 4th gear I have to get the engine up to 3000 rpm in order to cruise at 60 mph. Not a very efficient setup but it will do for now.
I'm guessing you have a multiport injected model and not the old TBI.

The emissions controls on the MPI model killed their fuel economy.
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