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fuel mileage


SKTLZ

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Probably old subject., new to rving...

 

I'm looking at purchasing an 5er toyhauler and mating it with a 1 ton dually truck with diesel, i'm wondering what kinda mileage one could expect to get, considering hwy mileage..I would be cruising around 65/70 mph....2nd part what does everyone think bout running 16 inch vs 17.5 trailer tires..

 

 

thanks Robert

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A few things to know before you could get a decent guess.

 

GVW of the trailer?

Height and width of the trailer

Make and engine of the truck

Gearing on the rear end

Transmission type

 

As far as tires go, most here will tell you to run Goodyear G114's on 17.5 wheels. With the weight a typical toyhauler will have on it, you will eventually have 17.5's so you might as well start there.

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I would guess you would be looking at about 12 mpg. My Ram 2015 3500 dually gets 12 at best towing between 60 and 65. Weight doesn't appear to effect the mileage as much as you would think. I think it is more the fact that you have a large wind sail that you are pulling. My RV weighs about 14000 lbs.

 

Tom

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I agree with the above post, speed hurts your mileage big time. I get 11.5 mpg at 60 mph with my 06 Chevy duramax and 34' fifth wheel at 24k gross weight. Any head wind will drop into the 10's. At 60 MPH, its a comfortable drive for me whereas at 70 I am stressed out and tense at the end of the day.

Greg

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Probably old subject., new to rving...

 

I'm looking at purchasing an 5er toyhauler and mating it with a 1 ton dually truck with diesel, i'm wondering what kinda mileage one could expect to get, considering hwy mileage..I would be cruising around 65/70 mph....2nd part what does everyone think bout running 16 inch vs 17.5 trailer tires..

 

 

thanks Robert

 

Hello Robert,

 

What brand of toy hauler are you thinking about ? Do you know the GVWR of the trailer that you what ? These questions being answered could help make sure you will have the right truck for the job. You want to pull your trailer as safe as possible. Wheel size for the trailer would be best at 17.5".

 

Al

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I tow a 26,500k fifth wheel with a 2016 ford with a 4:30 diff and average about 8.4 mpg. It is a 6.7 4x4 crew cab dully.

 

Rick

That is one freaking heavy 5th Wheel. :huh: What is in it that makes it that heavy of a load as you are close (or at) the GCWR of 35,000 lbs. What hitch are you using for that load? I thought my 5th wheel TH was heavy with 2 scooters in the back at 43' and 18.5k lbs. I haul with the same setup '16 Ford F350, 6.7, 4.3, 4x4 dually. :o

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That is one freaking heavy 5th Wheel. :huh: What is in it that makes it that heavy of a load as you are close (or at) the GCWR of 35,000 lbs. What hitch are you using for that load? I thought my 5th wheel TH was heavy with 2 scooters in the back at 43' and 18.5k lbs. I haul with the same setup '16 Ford F350, 6.7, 4.3, 4x4 dually. :o

I pull a New Horizons 40' solid cherry cabinets, residential Appl. 16" frame and so on. Just ordered a new 45' that weighs in at 33k I have to go to a class 8 tractor for this one.

 

The max towing on your truck is 31,200 so I am way below. You can't even tell the 26,500 is behind you,17.5 H rated tires on triple IS axles with 14" anti-lock disc brakes will drag my truck to a stop.

I use a comfort ride 30k air cell hitch with a 8k pin weight limit.

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We pull a 15,500 lb fifth wheel with a 2015 Ford F350 Dually 4 x 4, I try to go at 60 but we often travel 65. We seem to be somewhere between 11 and 12 mpg when averaged over along period and all wind road conditions.

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I pull a New Horizons 40' solid cherry cabinets, residential Appl. 16" frame and so on. Just ordered a new 45' that weighs in at 33k I have to go to a class 8 tractor for this one.

 

The max towing on your truck is 31,200 so I am way below. You can't even tell the 26,500 is behind you,17.5 H rated tires on triple IS axles with 14" anti-lock disc brakes will drag my truck to a stop.

I use a comfort ride 30k air cell hitch with a 8k pin weight limit.

No the max towing on my '16 truck, per Ford, is 26,500 (31,200 is for F450) w/ a 5th wheel if I had a Hitch with a 26k rating but only have 24K (which is enough) or 19,000 conventional bumper pull. GCWR is 35,000. . . I guess you have an F450 then.

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No the max towing on my '16 truck, per Ford, is 26,500 (31,200 is for F450) w/ a 5th wheel if I had a Hitch with a 26k rating but only have 24K (which is enough) or 19,000 conventional bumper pull. GCWR is 35,000. . . I guess you have an 450.

 

The Ford option 535 (max tow package) upgrades the 350 to the 450 suspension by adding the wide track front axle, 17" wheels and the 4:30 differential. The only reason ford limits the fifth wheel weight to 26,500 is because that is the largest hitch that they offer as an option. Note the #4 after the 26,500 weight now look at thier notes copied below. If you notice the 450 fifth wheel capacity is also only 26,500 even no the GCW ups to 40,400. # 4 note applies here also due to fords fifth wheel hitch option.

 

 

(1) Maximum loaded trailer weight requires weight-distributing hitch. See page 28 for additional information. only. (4) 5th-wheel towing capacity limited by availability of 26.5K hitch. (5) Gooseneck towing capacity.

(2) Pickup Box Delete Option.

(6) F-450 calculated with SAE J2807 method.

(3) Available with High-Capacity Trailer Tow Package

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No the max towing on my '16 truck, per Ford, is 26,500 (31,200 is for F450) w/ a 5th wheel if I had a Hitch with a 26k rating but only have 24K (which is enough) or 19,000 conventional bumper pull. GCWR is 35,000. . . I guess you have an F450 then.

 

This from fords F-450 brochure

 

Best-in-Class GCWR

Maximum 31,200-lb. tow rating*

Best-in-class 40,400-lb. gross combination weight rating (GCWR)*

F-450 with upgraded

High-Capacity F-350 Trailer Tow Package with features such as a wide-track front axle, suspension, tires and towing gear, the same that’s standard on the F-450

*When properly equipped. Class is Full-Size Pickups over 8,500 lbs. GVWR.

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I would guess you would be looking at about 12 mpg. My Ram 2015 3500 dually gets 12 at best towing between 60 and 65. Weight doesn't appear to effect the mileage as much as you would think. I think it is more the fact that you have a large wind sail that you are pulling. My RV weighs about 14000 lbs.

 

Tom

X2. When we had our 36' Toyhauler 5er, we found the same results of at least 12mpg. When we pulled in Mexico where the ave speed was 50 mph or less we ave at least 15mpg. Also have a Dodge Ram diesel. My Toyhauler weighed 19,000 loaded.

 

rocmoc n AZ/Fld/Baja

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