Ford Powerstroke Diesel Forum banner

1 - 19 of 19 Posts

·
Registered
Joined
·
75 Posts
Discussion Starter #1 (Edited)
I tried the search feature and while a couple of them came kind of close, none of them answered my questions specifically. I'm sure it's been asked here so I'm not sure why it didn't come up.

I've had an 04 F-350 Lariet FX4 dually (to pull my boat) and loved that truck! Diesel went to $3.00 a gallon (more than premium gas) and so I sold it after selling the boat. Now we'd love to have those prices back.

Getting ready to retire and travel in a couple of years so back at it. Last night I bought an extended cab (crew cab?) 2012 F-250 Lariet FX4 SRW. We'll be pulling a 5th wheel.

After much research and paying to join an RV consumer web site (much like Consumer Reports for the RV industry), I found the 5th wheel that's the lightest, all season (good down below freezing with heavier insulation and heated holding tanks), with the highest reliability and value scores.....the 2013 Fox Mountain 235RLS (made by Northwood) and it's dry weight is 7,020 with a GVW of 8,500. So it's light (the lightest of the all season 5th wheels and much lighter than most of you are hauling.

My questions:

What kind of mileage are you getting with the 6.7 (please indicate if it's 250-350 and cc or scc) driving unloaded?

What kind of mileage are you getting pulling the 5th wheels and at what weight is your 5th?

Probably should have asked these questions before I signed on the dotted line but this 5th wheel is a huge part of my retirement plan. We're going to give up the home completly and just travel.....at least for a few years or forever. I've found forums for "fulltime RVers" and the average age is 50-70. I was really surprised at that.....but somebody has to work those national parks, state parks and other public campgrounds.....especially when you only have to work four hours a day to cover your space and hookups. :D Sounds like the dream job to me.
 

·
Registered
Joined
·
300 Posts
You did not say what year you bought or the axle ratio but since you are in the 6.7 forum, I would guess a 2011 or 2012??

My loaded milage info is in my signature below for my F450.

I had a 2011 F250 with 355 gears before that so I know what it could do too.

The issue with the camper you are looking at and fuel mileage is not so much the weight but the wind drag it will have. 8,000 lbs just barely gets a 6.7 up to temperature good!!

That RV in my sig is 13 feet 4 inches tall. It does have an "aerodynamic" front cap but it really drags a lot of air at hiway speeds.

I pulled a large pontoon boat with my 2011 F250 and it would do around 12mpg at speed. That same F250 did 8mpg pulling the RV shown in my sig. I will guess your truck will do around 10 - 10.5 mpg pulling that baby fiver. If the camper is very low or has a wedged front it could do better.

I know you are looking at a very small RV but you will probably want to install a set of air bags on your truck when you get the camper. That will level you right up and give the truck a much better feel driving the load. You may even like the empty ride better with bags too -- I did.

Good Luck and enjoy your retirement - live long and prosper (Dr. Spock)
 

·
Registered
Joined
·
300 Posts
Oh yes, and WELCOME to the forum!!!!!!
 

·
Registered
Joined
·
75 Posts
Discussion Starter #4
Thanks for the response and feedback.

It's a 2012.....so what rear end is it?

Going to look in your gallery when I get a minute. Really curious what that Bed Rug looks like around your fifth wheel.

Is that 5th wheel a slider? I have the 6.75' bed and have been wondering which hitch I'm going to need to get.

The Mountain Fox does have the sloped front panel that's supposed to be aero dynamic (new this year to the Mountain Fox) however, it doesn't have the rounded corners for turning clearence that some have.
 

·
Registered
Joined
·
300 Posts
The slider will be on your list of things to do. You will be able to pull the camper without a slider but very limited on turns with a short bed and square nosed trailer. I would recommend a 10 inch slider (what I had in the F250 short bed) or even get a 12 inch if you want but you will need some room to maneuver in tight places.

You prolly have 355 gears in an F250 SRW. An easy way to tell is if the 4x4 switch on the dash will pull straight out a little - click. That is the electric locker switch and only available on 355 electric locker axle. Your dealer can tell you what axle you have if you can't figure it out. You may be able to call them with the VIN and get answer on phone. It would be good for you to know the ratio in your truck.

I had a plastic drop-in liner in my F250 - genuine Ford product. It was OK but everything you sit in there slides around. I did not want a spray-in liner, I have that in my work truck and don't like it so I got the Bed Rug thru Ford accessories for the F450. I really like the Bed Rug and it is as tough as advertised too. Dries right out after rain and looks great. It is super nice to crawl around on - just like the front room carpet!! I will buy another if this one ever goes south on me. I believe the Bed Rug only comes in an off Gray color but I could be wrong. The Gray looks great with my Silver paint anyway so I'm happy.

The Bed Rug does not have any openings for a 5th wheel hitch. I cut a couple of "door flaps" in my Bed Rug that flip up when the hitch is in and fold back down to cover when it is out. Works great!! A good razor knife will cut the BedRug easily. Just mark it and go!!
 

·
Registered
Joined
·
227 Posts
just don't take the 'pancake breakfast' job at the Badlands KOA - I've got dibs on it for 2018 :)

the PullRite hitch I use actually works very well. probably a bit of overkill for your particular application but having a slider on a short box is the only way to go.
 

·
Registered
Joined
·
965 Posts
Mine is a F350 with the 3.55 and 20" wheels. You can see my lifetime fuel milage in the Fuelly app in my signature.

I have pulled several 5th wheels. But mostly pull gooseneck horse trailers and equipment trailers. My 13,000 lb horse, Which is 7'6" tall ( floor to roof) and had a large hay rack on top of that gets me around 11 mpg. But I am driving here in the intermountain west up and down some pretty steep grades.
 

·
Registered
Joined
·
65 Posts
pulling mileage

i've got a 2011 f250 ccsb just got back from a 6k mie trip in july. we averaged 11.9 mpg my 5th wheel is a 2011 269bhs chaperral lite with a 9500 gvw i used a cort e16 slider hitch. the best thing about this truck when your pulling hills around the country you have power to spar when you need to pass anyong even up hill. good luck with your new truck and enjoy . i know i am.............
 

·
Registered
Joined
·
75 Posts
Discussion Starter #10 (Edited)
Picked up the new truck last night....

I had an 04 F-350 Lariet, FX-4 dually and I loved that truck. But it doesn't come close to what this truck is. So quiet, so smooth, so fast (for a stock diesel) and all the bells and whistles will take me weeks to figure it all out. I really like the fuel average gauge.....that helps me to keep my foot out of it.......at least until it gets broke in .......... feast your eyes on this baby.......















 

·
Registered
Joined
·
18 Posts
Great pictures, man. The truck looks perfect. Now get out there and enjoy it. :thumb:
 

·
Registered
Joined
·
300 Posts
dslbrnr is correct. With your cab/bed combo and 4X4 with diesel, you could have a 331 or 355 ratio and both come open axle or E-locker. Your window sticker will say what you have.

Congrats on the new ride, it's a honey!!
 

·
Registered
Joined
·
75 Posts
Discussion Starter #13
dslbrnr is correct. With your cab/bed combo and 4X4 with diesel, you could have a 331 or 355 ratio and both come open axle or E-locker. Your window sticker will say what you have.

Congrats on the new ride, it's a honey!!
You've been a big help already.....thank you!

It's a 3.55 Electronic Locking diff. I'm not sure exactly what that means if you (or somebody) could break it all down for me. I mean I know it gets me out of trouble if a wheel is slipping but I don't know what that means as far as tow-ability, mileage, etc. goes.
 

·
Registered
Joined
·
75 Posts
Discussion Starter #14
Did I say 20" wheels also?:thumb:
 

·
Registered
Joined
·
300 Posts
Just so I can sound like your mother - - read the book!! Read thru it quickly now and in a month, read it again and you will answer most all your questions about the truck. It has some very cool stuff you don't even know about yet!!!

Your Operators Manual will explain how and when to use the locker. To engage it you simply pull out the 4X4 swith knob. A light will come on in the dash to tell you it is locked.

With the switch pushed in to turn off the locker, the rear axle is "open" meaning one tire only can spin. If you engage the locker the axle becomes "locked" and BOTH tires must spin together.

Even though that sounds like something you would want all the time, it is not. As you turn a corner, the outside tire must travel farther than the inside tire does. An open axle allows this to happen easily. With a locked up axle one tire MUST slide to get around the corner. This wears tires and puts a lot of stress on the drive line.

As you read your manual you will see the truck's computer moniters the locker's actions to help keep trouble and broken parts away. Basicly, the locker is for when you will be on slippery surfaces or in poor traction conditions. (It will help a ton for stop light drag races I have heard - shhh)

The ratio number breaks down like this. Your 3.55 ratio means the drive shaft turns exactly 3.55 revolutions for each revolution the axle turns. As you can see, this is a slight torque advantage over a 3.31 ratio. However, a 331 will travel a little farther for a given number of drive shaft revs so mileage will be a little better with a smaller ratio number (a faster axle).

Your 355 axle will yeild around 1600 engine RPMs @ 65mph if I remember my F250 correctly.

What I am trying to say here is you have bought one hell of a strong truck!!! Enjoy the power and be safe friend!!

mowdoc
 

·
Registered
Joined
·
75 Posts
Discussion Starter #16
OK mowdoc.....I'm not asking you anything ever again!:haha:

Just funnin with you. I appreciate the short version. I spent an hour or two reading one of the 250 owners manuals that come with the new truck. By the time I got to page 95 I forgot what the first 90 pages were about. One of the side affects of getting old. :eek:hnoes:

That's what I meant by it'll take me a few weeks to get through it all. I've already learned a number of things but ya have to admit, it's not like the old days......there's a hell of a lot of stuff to learn to fully utilize all the features of this truck. I could have just bought the XL model and not had all these problems.:laugh:

I'll get it down....just takes a bit of time. I do realize I have way more truck than the Fox Mountain 5th wheel needs. However, I'm planning ahead.....never know when I want to move up to one of those placial mobil mansions.
 

·
Registered
Joined
·
300 Posts
Wait just a darn minute here, , , , first you say you are older than dirt and can't remember and then next you are boasting 20 inch wheels. I thought the young-uns liked big wheels.

Ha Ha - gotcha!!!

On a serious note, your truck has long lasting brakes. They take some miles to seat and perform best though. BOTH of my 6.7s were pretty weak when new. After 500 miles they will feel better and at 2000 miles they were working great. Please get some miles on your truck to seat the brakes and set the gears before towing or hauling huge loads. The diesel is ready to go now but other parts of your truck need to "break-in" a little before going to work.

Gloss over your manual now and then use the truck for a few weeks. When you reread the book you will understand it better and know what it is saying. How do I know this you ask?? Well, I am an old geezer too!!!
 

·
Registered
Joined
·
75 Posts
Discussion Starter #18
Wait just a darn minute here, , , , first you say you are older than dirt and can't remember and then next you are boasting 20 inch wheels. I thought the young-uns liked big wheels.
My wife accuses me of being a 20 yr old trapped in an old man's body.:woot: My grandkids think I'm the big kid on the block.:thumb:

Rut-rohhhh......going to pick up our new 5th wheel this Sat. 45 miles away, but I'll be driving like an old man.:hehe:
 

·
Registered
Joined
·
300 Posts
I understand that, , , , , I am a lesbian trapped in an old man's body. I kinda like it this way though.

Have fun Saturday. You have a lot of new toys to play with and about 2 inches of manuals to read!!!

I am in an RV forum, RV dot net, if you are looking for one. You can learn a lot about towing, camping and travel there. I use my same screen name in the Toy Hauler section.

Cheers
mowdoc
 
1 - 19 of 19 Posts
Top