Auxiliary fuel tank

[markc]

Has anyone installed an auxiliary fuel tank in the bed of their truck?
I have a 2019 F250 diesel crew cab with the short bed.
Just wondering if you had problems and solutions.
Thanks.

[Bionic_Man]

Not trying to be "that guy", but there are many threads on this. If you search, you will find the same answers. Those of us that have them for the most part really like them. Those that have never used them will talk about how it is a waste, and you have to stop for biological reasons, so just stop when getting fuel. You will almost certainly even find someone who posts a photo of a single yellow 5 gallon can that they claim is equivalent to a transfer tank......

Anyway, I have a 60 gallon RDS tank/tool box combo. Love it. Great investment. No need for a fuel pump, gravity feed works fine. Choose where you stop instead of stopping when you have to.

[BarryG20]

Titan makes a 55 gallon midship replacement for that truck. Don’t lose any bed space that way if that is important to you

[Splashers3]

I have a 40 gal Titan high polymer tank in the bed. It came with its own pump system and all I need to do is press a button in the cab. It will add into the truck tank 5 gal in a 10 min span and then shut off. I repeat if I want more. Of course I can shut it off before 10 min if I want. The in cab controller has 10 small LEDs, when lit, show how full the tank is - also making it easy to know how much I need to add when I refill it....should it not be empty.

It was really easy to change out the inline filter located above the tank, within a compartment. I also order a locking cap.

They make a 50 Gal version, but I wanted the extra space on the sidewalls (The 40 gal version is not as wide as the 50 gal.)

I love the extra capacity.

[SDcampowneroper]

We have had an in bed auxiliary tank in our 8' bed trucks for over 35 years. Never have I connected the tank to the truck always used with a transfer pump. , as we also switched fuel according to season.
When RVing, on a long or snowbirding trip, Diesel gives long range(1100 mi. +) and the ability to fuel when and where we chose.
In our business season when we could not travel much I switched to gasoline to fuel mowers, gas SxS, gennys and such.
For us it is financially worthwhile as I have welded every tank and can commonly save $. 20-50/ gal fuelling .
A meter and water block filter on the pump solved use and condensation issues.

[Durb]

My Aluminum Tank Industry 46 gallon tank can be purchased for $630 which includes the Fuel Shotz filler hose system. I installed it 2 years ago, fuel cost savings will have it paid for early next year. and I only tow about 6k miles per year. Don't know where the comment about never recouping the cost comes from. Since installing, I have only filled my tanks at Costco after a round trip. Fuel on the coast or in the mountains can be 50 cents to a dollar per gallon higher. No electric pump either. I feel it was a good add.

[work2much]

95 gallon transfer with tool box. 2 birds... Since installing we haven't fueled while hitched, something I don't really like doing.

With a short bed you may have to go smaller and remember that these boxes full of fuel are heavy so account for that in your payload/pin weigh calcs.

[Vette_Racer]

I have used a 95 gal RDS gravity flow tank in both Chevy and Ram trucks, no issues what so ever. They just connect to the filler pipe about 12 inches down and have a check valve to prevent overfilling. I always just put fuel in the large tank and go, over the years I have saved many a dollar in fuel costs, sometimes up to a dollar a gal by bypassing a state where fuel is extremely high and not having to refuel until you want to is a big plus. Wouldn't tow without one.

[Edd505]

Wouldn't be w/o pulling 14K 5W, 80 gallons in a SRW 8ft bed.

[azdryheat]

Yes and no problems.

[fj12ryder]

My wife bought me an auxiliary fuel tank for Christmas quite a few years ago. A 36 gallon tank with a separate filler pump nozzle. Cost was around $500 total. One of my best Christmas presents ever. I love stopping when I want to, and not when the truck says I have to. Take our breaks at rest areas, and city parks instead of gas stations and truck stops.

[MarkTwain]

RoyF wrote:
I had a 100-gallon Transfer-Flow tank in a long-bed 2008 Ford F350 diesel. One small problem (if you even call it that) was that the amount of fuel on the display was always less than what was in the tank -- I would have about 20 gallons left when it displayed 0 gallons.

Another slight problem was that leaves and debris that collected in the one-inch space behind the tank were difficult to remove.

I recently traded for a 2021 long-bed diesel, and want to get another Transfer-Flow when one becomes available for the 2021 Fords. I do it for peace-of-mind; so that I can tow for three for four days without constantly having to worry about fuel; so that I can reach Yellowstone (for example) at the end of a driving day and still enjoy driving around for the next couple of days without having to think about visiting a station. To me, that's worth 50 cents a day spread out over ten years.

You do NOT get a transfer tank to for the purpose of finding cheaper fuel (you never save enough to get your money back), but a side benefit is that you have the option of topping-up whenever you happen to see a good price, or you can keep on trucking though a state where fuel is more expensive. But, as I said, that is secondary to peace-of-mind.

Metal transfer tanks will have a good deal of water condensation. I put a water-separation filter in the line coming out of the transfer tank. That helped to keep water of out the main tank and not overtax the truck's own water-separation filter.

Give Transfer a call and they will recalibrate your tank gauge.

[TimnJo]

I very much agree with Roy's comments, save for the leaves part; my tank is fully under my tonneau cover. I too have a steel tank but don't have an additional water filter and haven't had any water in fuel issues, even after leaving it empty all winter. I put an inline electric fuel shutoff with a dash switch for easier control of when the auxiliary flows into the main.

[OkieGene]

Go to Transfer Flow dot com and run your truck through the options. You might be able to get a larger tank to replace the one you have now, or one to sit under the truck bed somewhere.

They also have a lot options for an in-bed tank, anything from a fuel only tank to one that shares space with a toolbox.
.

[RoyF]

I had a 100-gallon Transfer-Flow tank in a long-bed 2008 Ford F350 diesel. One small problem (if you even call it that) was that the amount of fuel on the display was always less than what was in the tank -- I would have about 20 gallons left when it displayed 0 gallons.

Another slight problem was that leaves and debris that collected in the one-inch space behind the tank were difficult to remove.

I recently traded for a 2021 long-bed diesel, and want to get another Transfer-Flow when one becomes available for the 2021 Fords. I do it for peace-of-mind; so that I can tow for three for four days without constantly having to worry about fuel; so that I can reach Yellowstone (for example) at the end of a driving day and still enjoy driving around for the next couple of days without having to think about visiting a station. To me, that's worth 50 cents a day spread out over ten years.

You do NOT get a transfer tank to for the purpose of finding cheaper fuel (you never save enough to get your money back), but a side benefit is that you have the option of topping-up whenever you happen to see a good price, or you can keep on trucking though a state where fuel is more expensive. But, as I said, that is secondary to peace-of-mind.

Metal transfer tanks will have a good deal of water condensation. I put a water-separation filter in the line coming out of the transfer tank. That helped to keep water of out the main tank and not overtax the truck's own water-separation filter.

[Lwiddis]

You'll also need to install an electric pump if the auxiliary is connected to your factory tank.