Tow Vehicle - Auxilary Fuel Tank?

[Time & Tide]

Does anyone have experience with using an auxiliary fuel tank in their tow vehicle (e.g. brands, features, likes/dislikes, worth it)? We're relatively new to RV'ing and in planning our first long trip for this summer (around 2,400miles), I realize that we'll be limited to around 230 miles on our 2017 Ram 3500. (Rationale: 32gal diesel, average 9mpg towing in mixed terrain and keeping a 20% safety margin). I've used a few different iPhone apps to map out Truck Stop-style refueling points so we don't have to unhitch our 41 foot 5th wheel at the station because of low overhead clearance, tight turns in/out, etc. However, those truck stops seem to be located in clusters near the end of our range. I appreciate any advice.

[dirtclod]

We installed a 50 gal titian poly tank to replace a 25 gal, has worked goog, doubled our range, good luck!

[azjohnnyo]

I would go with Titan also. They don't have a replacement tank for my truck, RAM 2500 CCSB 4X4, so I am going to probably do the spare tire version which adds 30 gallons. It's a pretty cool setup: Spare Tire Aux Tank

[D2Reid]

I was stopping every 100 miles to fuel up. Worked pretty good in the east. Then we started heading more west. Amazed to see a sign that read "No services for 68 miles.". I added a 40 gallon auxiliary tank with a drip fill (diesel only). Now I fill once a day. Usually after we have parked for the night.

The extra 35 gallons of diesel weighs 248 pounds, the tank weighs around 100 pounds.

[perfpix]

We installed a 50 gal titian poly tank to replace a 25 gal, has worked goog, doubled our range, good luck!

What did it end up costing to get your Titan tank installed? I'm looking at that same option.

Thanks, John

[cnaegle]

I have a transfer flow fuel tank/ tool box combo. Added 40 gallons to the total and we love it.

[jas67621]

I am interested in adding an aux tank to my 2016 3500 HD SRW. I have a ReTrax retractable tonneau cover. I found one that should work with it. It is made by Transfer Flow and is 37 gallons. Anyone have this with the ReTrax?

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[dirtclod]

What did it end up costing to get your Titan tank installed? I'm looking at that same option.

Thanks, John

I have my own shop, so I replaced the tank myself, 4-5hrs. Had the local dealership re flash trip computer telling it we now have a 50 gal tank.

[Time & Tide]

I have a transfer flow fuel tank/ tool box combo. Added 40 gallons to the total and we love it.

Which make and model do you have? Did you do the install yourself?


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[USN2USA]

I also installed a 40gal RDS combo Fuel tank/tool box combo (Model#72775). Got it from Northern during one of their sales.
It not only adds the ability to travel a full days-worth of miles and refuel when stopped for the night but it also holds a jack, jack stands and a few tools to boot.
I also like that it is low profile so its hidden under the Truxedo bed cover when I'm not towing.