I am looking at these for the new truck. Probably in the 40-60 gallon range. Maybe with a tool box.Those of you that have/had them, what are your likes and dislikes? What about brands? Good, better, best,,,, and why?

I have a 35 gallon tank in the bed of my Dodge dually and simply love it. Best money I've ever spent on something that wasn't motorcycle related. I love that I don't have to check out the fuel stations ahead of time to make sure I can get in, and, more importantly out, with that 40' toyhauler in tow. I can carry enough fuel to only have to fill up at the end of the day when the 5th wheel is not hooked up. Lowers the daily stress level considerably, especially if you're traveling the two lane highways with fewer big ol' truck stops.I like taking breaks at rest stops, or parks rather than using the fuel stop as break time. I like being on my schedule rather than the trucks fuel tank's schedule.Okay, the cons...uh...well...hmm...it does cost more when I fill both tanks.

I have a simple 25 gallon Enduraplas tank. They make a 55 gallon tank also.It is a simple transfer tank with a nozzle that you manually fill your tank with. I use a 12 volt jump box to power the built in pump.It does the trick no installation required. I can move to my next truck or put it in another truck in minutes. Not quite as convenient as a piped in tank but just as useful. Easily removable if you want the space back.Works great. Use it when you want . Remove it if you want.Very versatile and flexibleEnduraplas Tank

60 ga. RDS gravity fed. Get fuel when it’s cheap and roll on.

Dislikes:They take up bed spaceAlmost always have to drill through the bed to mount themAlmost always have to drill through the bed to wire themThe nozzle and pump assembly get messy and stinky.I prefer OEM tank replacements from Titan Truck or other manufacturers.

I have a 41 gallon tank from Aluminum Tank Industries. I'm pleased with the quality and the price was good. It is gravity feed but I also installed an electric valve and indicator light. The gravity feed filler neck valve works fine; I just didn't trust it completely from the outset.I reset my trip meter and use the MPG readout to calculate my fuel usage per fill up. I would prefer to have an in-cab gauge for the auxiliary, but I went on the cheap.I agree with what FJ12 posted. Less stress and peace of mind. I also buy less expensive fuel; I calculate tank payback to be about three years.I average 11.2 MPG towing which easily gives me 750 miles of range; more than I can do in a day. Most round trips I take, I can do on a single fill up, then hit Costco when I get home.

In bed diesel tanks | Good Sam Community

73 Replies

fj12ryder
Explorer III
Jun 04, 2020
jshupe wrote:
FishOnOne wrote:
Lantley wrote:
valhalla360 wrote:
Don't forget to account for it when considering payload. a 50gal metal tank is going to eat up around 500lb of payload when full.

The OP has a 2020 dually with lots of payload.
Many choose to go with a DRW vs. a questionable or borderline SRW set up to eliminate any payload concerns.
Some are OK with cutting it close or trying to precisely match payload. Many have decided to step it up to have more than ample payload so they can add cargo or go to a larger trailer without payload concerns.

And many choose a truck with ample fuel capacity from a factory tank.

Unless they're coming with 80+ gallons, they're not coming with ample capacity. I think the biggest available is in the 50s.
Yeah, I'm kind of wondering what amount is "ample". Unless it approaches 65 gallons, it isn't ample. I didn't know anyone offered tanks much bigger than 35 gallons, which is not "ample".
n0arp
Explorer
Jun 04, 2020
FishOnOne wrote:
Lantley wrote:
valhalla360 wrote:
Don't forget to account for it when considering payload. a 50gal metal tank is going to eat up around 500lb of payload when full.

The OP has a 2020 dually with lots of payload.
Many choose to go with a DRW vs. a questionable or borderline SRW set up to eliminate any payload concerns.
Some are OK with cutting it close or trying to precisely match payload. Many have decided to step it up to have more than ample payload so they can add cargo or go to a larger trailer without payload concerns.

And many choose a truck with ample fuel capacity from a factory tank.

Unless they're coming with 80+ gallons, they're not coming with ample capacity. I think the biggest available is in the 50s.
FishOnOne
Nomad
Jun 04, 2020
Lantley wrote:
valhalla360 wrote:
Don't forget to account for it when considering payload. a 50gal metal tank is going to eat up around 500lb of payload when full.

The OP has a 2020 dually with lots of payload.
Many choose to go with a DRW vs. a questionable or borderline SRW set up to eliminate any payload concerns.
Some are OK with cutting it close or trying to precisely match payload. Many have decided to step it up to have more than ample payload so they can add cargo or go to a larger trailer without payload concerns.

And many choose a truck with ample fuel capacity from a factory tank.
Huntindog
Explorer
Jun 04, 2020
PA12DRVR wrote:
FWIW, the toolbox top was great, but it couldn't hold my tools and "stuff" (lube, air chuck, etc), so I had to carry another container of tools-n-stuff anyway.
Was that due to the volume of tools you carry?
Huntindog
Explorer
Jun 04, 2020
Lantley wrote:
valhalla360 wrote:
Don't forget to account for it when considering payload. a 50gal metal tank is going to eat up around 500lb of payload when full.

The OP has a 2020 dually with lots of payload.
Many choose to go with a DRW vs. a questionable or borderline SRW set up to eliminate any payload concerns.
Some are OK with cutting it close or trying to precisely match payload. Many have decided to step it up to have more than ample payload so they can add cargo or go to a larger trailer without payload concerns.
On top of that, I am going to put helium in the tires.:B
2oldman
Explorer II
Jun 04, 2020
I used to have 50gal Transferflow with attached pump/nozzle. It worked ok, but I much prefer the 100gal on board now.

Soon after 9/11 I couldn't drive over the Hoover dam with it.
Huntindog
Explorer
Jun 04, 2020
Cummins12V98 wrote:
How many gallons is the stock tank?
36
n0arp
Explorer
Jun 04, 2020
60 gallon RDS tank. This is my second one (different trucks).

First one was gravity fed. For the second one, I opted to use a 12V pump connected to one of my upfitter switches to feed the diesel through a fuel/water filter/separator first on the way to the tank. As a bonus, I can do it all from the cab.

I can't remember the last time I filled up with the RV, or paid exorbitant truck stop prices. I get to shop around and get fuel when and where I want.
PA12DRVR
Explorer
Jun 04, 2020
fj12ryder wrote:
I have a 35 gallon tank in the bed of my Dodge dually and simply love it. Best money I've ever spent on something that wasn't motorcycle related.

I love that I don't have to check out the fuel stations ahead of time to make sure I can get in, and, more importantly out, with that 40' toyhauler in tow. I can carry enough fuel to only have to fill up at the end of the day when the 5th wheel is not hooked up. Lowers the daily stress level considerably, especially if you're traveling the two lane highways with fewer big ol' truck stops.

I like taking breaks at rest stops, or parks rather than using the fuel stop as break time.

I like being on my schedule rather than the trucks fuel tank's schedule.

Okay, the cons...uh...well...hmm...it does cost more when I fill both tanks.

^^^ x 2 (or 3). Had an in-bed tank on my F350, then got another 350 after the first one was stolen.

I got the tanks from American Tank (??) in Frisco Texas. Got a 60 gallon tank the first time; 2nd go-around was a 40-is gallon with toolbox top. FWIW, the toolbox top was great, but it couldn't hold my tools and "stuff" (lube, air chuck, etc), so I had to carry another container of tools-n-stuff anyway.

I did the plumb-it-into-the-system route; ended up with a in-dash switch that changed the feed and the gauge read between the factory tank and the aux tank. I really liked the setup and really liked having a 1000+ mile range between fillups...allowing fillup after dropping the 39' FW in the evening.

They do take bed space but I was towing a FW anyway, so the bed was mostly shot for any significant hauling. I had the shop do the install for me...that was another $125 or so back in the day.

...and of course, if one fills both the factory tank and the aux tank at the same time, your bankcard will whimper a bit. :E
Cummins12V98
Explorer III
Jun 04, 2020
How many gallons is the stock tank?

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In bed diesel tanks

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