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Old 06-06-2012, 03:05 PM   #21
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Also, don't one ton trucks have a reporting requirement with DOT; records, maintenance, all that stuff? They do here in MN. Extra hassle factor.
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Old 06-06-2012, 03:38 PM   #22
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I don't know about MN, but in most states those DOT requirements apply to commercial vehicles. They do not apply to private vehicles that are not in commercial service. Vehicle size or weight rating is not a factor.
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Old 06-06-2012, 04:09 PM   #23
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2008 GMC 2500HD with Duramax and Allison transmission.
Love it; keeping it.

Will one day be towing a 2020 Forest River 5th wheel with it.

I may have to convert it to wind power though...
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Old 06-06-2012, 04:25 PM   #24
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A good friend of mine had a 2011 3/4 Dodge diesel and returned it to the dealer because of poor gas mileage, they even offered to do a full delete and tune for free. He said it would only get 8 in the city and 14 highway so he still traded it in. I know his other truck is a STR-10 so maybe he didn't want 2 gas guzzlers.

My GMC gets 17mpg combined and could be happier with it.

Don't forget the new J2807 standards when they come out will more than likely change a lot of numbers. GM has released their numbers but recently have said they will not implement them until all the manufactures are on board.

From what I see towing a 5er will take the biggest hit with 3/4 ton.
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Old 06-06-2012, 04:39 PM   #25
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When you think about it, the biggest factor in gas mileage is relative wind induced drag. This has to be overcome with engine power.

The taller your camper for a given weight; the worse your gas milage will be. This is one of the many advantages a travel trailer has over a 5th wheel; better gas milage all other things being equal.

Picture trying to hold up a 4x8 sheet of plywood standing in the bed of your truck driving down the road and then with a 4x4 sheet of plywood.
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Old 06-06-2012, 07:19 PM   #26
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Herk, I went from a 8526 ??? 5'vr to a 320 RLT Prime Time Crusader. From about 9,000 lbs. gross , to about 12,500 lbs. gross and honestly I lost maybe a half mile per gallon in all terrain. I think it's the combination of the D-Max and the Allison And the aerodynamics of the Crusader. The Flagstaff is 11 1/2' tall as opposed to the Crusader @ 12 1/2'. As you know the Allison adapts well as it is a learning tranny. Oh, sorry, I have a 2005 2500HD SB SRW STD bed quad cab Duramax/Allison.
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Old 06-06-2012, 07:29 PM   #27
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Quote:
Originally Posted by grayfox View Post
Herk, I went from a 8526 ??? 5'vr to a 320 RLT Prime Time Crusader. From about 9,000 lbs. gross , to about 12,500 lbs. gross and honestly I lost maybe a half mile per gallon in all terrain. I think it's the combination of the D-Max and the Allison And the aerodynamics of the Crusader. The Flagstaff is 11 1/2' tall as opposed to the Crusader @ 12 1/2'. As you know the Allison adapts well as it is a learning tranny. Oh, sorry, I have a 2005 2500HD Duramax/Allison.
I have talked to folks towing 15,000 pound Montana Fivers with my truck who get about the same MPG I do towing the Flagstaff. (Was one at the FAMCAMP last week in fact). Said he was carrying a 3000 pound pin. I mentioned that I thought his truck was "bowed in the middle" as a joke and he liked to have a heart attack.

The Crusader is very streamlined and the extra foot in height is somewhat offset by the better aerodynamics.

What I was referring to was a comparison (the all things being equal part) between the travel trailer and the 5th wheel. The real increase in MPG appears when you compare your 12 foot high 5th wheel to an 8 foot high travel trailer (about 18 to 24 inches above the truck roof).
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Old 06-06-2012, 07:55 PM   #28
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Absolutely.... Got cha. your right on the money. I do love my 5'vr over a travel trailer even with some sacrifice in fuel economy .
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Old 06-07-2012, 07:28 AM   #29
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I gained 2 MPG when I went to my 5'er from a TT.
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Old 06-07-2012, 08:17 AM   #30
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I also improved gas mileage from a 4000 lb Hybrid to a ~8000 lb 5er. Go figure.
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