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Old 12-07-2015, 06:47 PM   #21
gearhead
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Originally Posted by notanlines View Post
A short story and then a question. A friend is towing a super-lite 5th wheel and has a gasoline engine. He was told by the RV dealer that 11-14 should be his mileage. Now that he has gotten home he and momma did he REAL math and got 8.1 over 2600 miles. What he is sad mostly over is his truck only has a 26 gallon tank. Anybody have any experience with installing an upright auxiliary "gasoline" tank in the bed. Neither of them are thrilled with stopping every 160 miles to refuel. Many thanks to all.
I replaced the factory 35? gallon frame mounted under body gas tank on our Class C with a 55? gallon in the same location. I did it by myself with jacks and cribbing. In a barn in July in Texas.
That was in the 1980's and I was a bit younger.
It wasn't a bad job, just some other time of the year would have been smarter.
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Old 12-08-2015, 08:24 AM   #22
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Originally Posted by Cyncwby View Post
Retired cop here....one other thing to consider that most folks don't think about with the big aux tank and pump/hose showing. No good chicken sh-- thieves, I had 2 calls that I can remember where guys got there diesel tanks emptied and one even got the hose stolen along with it. Both trucks were sitting in thier driveways at night. Point is....doesn't pay to advertise.
I agree. I don't have the hose and transfer pump on mine, just a locking cap. The pump I use to move fuel from the tank to the main tank is a small electric, controlled from a toggle on the dash. I keep it hidden down near the floor inside the bed. My setup sits low enough in the truck that I'm probably going to add a tonneau cover as well.
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Old 12-23-2015, 07:03 PM   #23
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I just traded in my 2011 F350 SRW for a 2016 F350 DRW. It has 35 gallon tank, but I've been considering an aux tank. I pull a TT Toy Hauler but I also have a cap on the bed.

I've been looking at how to get an aux tank on but the only real option seems to be the spare tire replacement tank, but I still have a problem: it requires putting a 2nd filler cap in the side of the bed, where I would like to not have to do this. I guess there's an option to have the filler on the inside of the bed, but I'm having a difficult time imagining how I would need to drop the rear gate (with a trailer attached) in order to fill the tank while on the road.

I think what I would really want is a tank in the front of the bed and somehow be able to fill it through the slide window of the cap or mount the filler on the cap (but that presents problems if I want to remove the cap).

Anybody ever seen any other alternatives for a P/U with a cap on it and still have an aux tank?

I would like to keep the OEM tank on the truck itself. (It's a brand new truck afterall and I don't want to void any warranty, if possible).

Thanks,
FBN
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Old 12-23-2015, 07:47 PM   #24
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An inbed auxillary fuel tank would probably give you more "total fuel" as you can install most any size ahead of your fifth wheel hitch. But, the cap (you didn't indicate if it was a tonneau cover or a full size cap) will interfere with adding fuel whether you're towing or solo as long as the cap is in place. Most of the "spare tire tanks" are 26 gallons and, as you said, you'll be faced with where to locate the fuel fill access.

Have you considered Titan's "direct replacement tank"?? It is a 67 gallon total capacity, that's 31 gallons more than your current tank and 5 gallons more than your current tank and the "spare tire tank". Granted, it's a "pricey" option, but then it's also a "one time install and done with it" with none of the "plumbing issues or fuel transfer issues" that you'd have with two tanks.

Something to consider, and it's almost double your current 36 gallons. Not an easy option to spend that kind of money, but...... Good Luck
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Old 12-24-2015, 03:02 AM   #25
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I assume you are talking about a regular topper type bed cap since you said you might be able to fill the tank through a side window.

I'd don't see why you couldn't add a piece of hose from the aux tank fill neck and run it to the side of the topper. You could then install a filler neck in the side of the topper and connect the hose. That would only require disconnecting the hose to remove the topper and reinstalling the aux tank fuel cap. I'm sure any quality machine shop could weld a filler neck to a mounting plate that would allow you to install it in the side of the topper and would accept a standard locking fuel cap. A nice aluminum mounting ring on each side of the topper would allow a sandwich type installation and would look very nice. Hope this makes sense.
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Old 12-26-2015, 06:39 AM   #26
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Thank you Brent and John.

Yes, the cap is full cap (is the same vertial height as the cab). I think putting in a filler cap in the fiberglass cap is preferable to drilling a hole in the side of the bed.

Re: only additional 26 gallons from a spare tire tank. That amount would be sufficient for me. What I'm looking for is to get the same range on 1 fill-up when I'm towing as when I'm not - maybe ~500 miles. There are some pretty long stretches in the Mid-West (like through Nebraska) that I get pretty nervous about running out of fuel, especially since I travel mostly at night - and sometimes there aren't many options for refueling late night/early morning. My GPS was a real life-saver on my last trip since I could locate stations fairly easily.

Now I just have to solve one additional "requirement". The truck also does normal truck duties as well and that means occassionally hauling 4x8 sheets of material. With an in-bed tank, I've seen tanks that "rest" on the bed sides and are suspended from (i.e. don't rest on) the bottom of the bed, but in my case with a Cap, resting on the bed sides in not an option. But doing this would allow me to slide a full 4x8 sheet under the tank when needed. It's normally only a couple of sheets so I only need maybe 4" max.

I have until the Spring to figure this out. That's when my next long trip is going to be.

Thanks,
Jim
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Old 12-26-2015, 07:52 AM   #27
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If money is not a "critical factor", check this out: https://titanfueltanks.com/shop/ford...ies-2011-2012/
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Old 12-26-2015, 02:50 PM   #28
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You could weld a cross beam into the side of the bed and support the tank on that leaving a few inches underneath for plywood. As for locations for fuel, I always planned my trips using the Pilot/Flying J website. It shows station locations by state, highway, and exit. Also shows fuel prices at each. Even out west there weren't many spots where you didn't have a station every 100 miles or so. I planned the entire trip prior to leaving, knew exactly where I was stopping and what exit it was at.
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Old 12-27-2015, 06:40 AM   #29
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Originally Posted by flybynight View Post
I just traded in my 2011 F350 SRW for a 2016 F350 DRW. It has 35 gallon tank, but I've been considering an aux tank. I pull a TT Toy Hauler but I also have a cap on the bed.

I've been looking at how to get an aux tank on but the only real option seems to be the spare tire replacement tank, but I still have a problem: it requires putting a 2nd filler cap in the side of the bed, where I would like to not have to do this. I guess there's an option to have the filler on the inside of the bed, but I'm having a difficult time imagining how I would need to drop the rear gate (with a trailer attached) in order to fill the tank while on the road.

I think what I would really want is a tank in the front of the bed and somehow be able to fill it through the slide window of the cap or mount the filler on the cap (but that presents problems if I want to remove the cap).

Anybody ever seen any other alternatives for a P/U with a cap on it and still have an aux tank?

I would like to keep the OEM tank on the truck itself. (It's a brand new truck afterall and I don't want to void any warranty, if possible).

Thanks,
FBN
I have the Titan 65 gallon replacement tank on my truck. The tank won't void the warranty of your truck. The only expense you might incur would be additional charge to replace the fuel tank pump assembly due to increase size of tank and maybe extra time to perform the work. But, personally, I don't see why it should cost more. There are some dealers that have been known to do the replacement work for their customers.
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Old 12-27-2015, 05:39 PM   #30
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Magnison Moss makes sure that aftermarket parts that aren't causing problems don't "void" the rest of the warranty... If they do cause a direct issue, that's different.

Why would a larger tank necessitate a fuel pump replacement? The pump does have to come out, but why replace it?
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Old 12-28-2015, 05:27 AM   #31
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Magnison Moss makes sure that aftermarket parts that aren't causing problems don't "void" the rest of the warranty... If they do cause a direct issue, that's different.

Why would a larger tank necessitate a fuel pump replacement? The pump does have to come out, but why replace it?
I believe he was stating that the pump MAY have to come out due to the different tank size. The pump is part of the pick up so if the depth of the tank is different it would require a longer pick up tube/assembly. If I remember correctly from when I looked at them Titan kits come with everything that is required for installation, they're just too expensive for my pockets.
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Old 12-28-2015, 06:13 AM   #32
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Hi Jim,

I was looking around on the Titan fuel tank website and found this in the scratch and dent area, seems exactly what you were looking for.

https://titanfueltanks.com/shop/rise...n-in-bed-tank/
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Old 12-28-2015, 07:49 AM   #33
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I have the Titan 65 gallon tank. It replaces the OEM tank. Uses OEM fuel pump. My dealer installed and reprogramed computer for 65 gallon. Works flawlessly. I have traveled over 30K miles since install, and not a single issue. My next truck will have the same setup. Yes, a little pricey, however I have saved a lot on fuel cost due to being able to bypass some areas where diesel is higher. Also like the convenience of fewer fuel stops and stopping at rest areas as opposed to stopping at truck stops.

Ken
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Old 12-28-2015, 10:39 AM   #34
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I believe he was stating that the pump MAY have to come out due to the different tank size. The pump is part of the pick up so if the depth of the tank is different it would require a longer pick up tube/assembly. If I remember correctly from when I looked at them Titan kits come with everything that is required for installation, they're just too expensive for my pockets.
Ahh.. gotcha. On many of the fuel pumps I've messed with the pickup depth is adjustable at one place or another, but I understand that might not be true for all pumps. As an OEM pump can run well into big bucks, probably good to figure out up front.

An extended tank is on my list and I don't want to sacrifice bed space, so that likely means $$.
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Old 12-28-2015, 06:01 PM   #35
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Originally Posted by dcg9381 View Post
Magnison Moss makes sure that aftermarket parts that aren't causing problems don't "void" the rest of the warranty... If they do cause a direct issue, that's different.

Why would a larger tank necessitate a fuel pump replacement? The pump does have to come out, but why replace it?
The "fuel pump replacement" reference pertained to "should the pump fail" and the dealer had to replace it under warranty, they might try to charge the owner a fee due to the extra fuel that might be in the tank at repair time and the time to drain the tank.
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Old 02-28-2016, 08:46 AM   #36
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Fuel

I have been using a KSH fuel/tool combo for more than 7 years. It has it's own pump and is FLAT on top. Nothing above the bed rail. It holds 65 gals along with the main tank I can get about 1000 mile range. I am retired so no need for very much tool space. When I have a need I just use a "A" frame set up that spans the width of the bed and lift it out. I like the pump system because I have use it in three different trucks. For power to the pump motor I wired direct from the battery under the truck to the bed with a trailer 4 way plug (use just two wires 1 hot 1 ground) (ground just from frame under tank)that I just plug in when needed. That way I just refill main tank when needed.
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Old 02-29-2016, 07:41 AM   #37
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So I've started shopping for one.. Busted out the measuring tape today and surprisingly there are not a lot of options for a short bed pickup (megacab) with a 5th wheel sliding hitch installed. I've got about 17" from the front of that hitch setup to front of the bed...

I may go with one of the "sidekick" tanks from Titan, but they're only 15 gallons.

Looking under the truck, there's a good 12-16" where the fuel tank should be expanded, but if I replace the whole thing, I start losing ground clearance and a plastic fuel thank hanging down isn't on my desirable list...
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Old 03-02-2016, 07:31 AM   #38
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Smile AUX Fuel Tank

I got mine from Northern Tool on line in 2013. It's been on with gravity feed ever since. At 55' long I pick out truck stops that are easy to get in and out of easily. 97 gallons on board when I'm full. Use to hurt when fuel was almost $5.00 per gal.
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Old 03-02-2016, 07:39 AM   #39
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I was going to add a tank in the bed under the bed locker roll up box area and it was going to be 30 Gal and my stock tank is 36 and it was going to be $1900 but I found a OEM replacement for $1400 installed and it will have 70 Gal. and I keep the room in the truck bed for my junk. LOL
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Old 03-04-2016, 10:06 PM   #40
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If money is not a "critical factor", check this out: https://titanfueltanks.com/shop/ford...ies-2011-2012/
I had a Titan 52 gal. gas tank in my old truck it was a 2006 Chevy 2500HD crew cab short bed and it was a great tank. I think I paid around $1250.00 installed with the skid plate added.

I am looking at a place in So. Cal. called Aero Tanks for $1400 installed and it's a 70 Gal. tank for a long bed Chevy.

http://www.aerotanks.com/inventory/c70.html
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