Forum Discussion

Keithk3628's avatar
Keithk3628
Explorer
Sep 18, 2018

Help with auxiliary fuel tank decision or replacement.

I am trying to decide between a 50 gallon Titan replacement tank or a 28 gallon auxiliary tank added to my bed.

My thinking is the Titan is probably best except for one thing, I put very little use or miles on the truck for 8-9 months of the year and I am worried that 50 gallons of fuel could go bad in that kind of time frame.

I always keep my tank full or as close to full as possible inorder to prevent condensation in the tank, and 50 gallons will sit in the tank for months with the occasional top off.

If I went with the auxiliary tank I am thinking I could leave it dry for the idle time and only fill when I am traveling for the 2-3 months pulling our 5ver.

I have a 2016 F350 with a Reflex roll up bed cover so the auxiliary tank will be small and in front of the hitch, but below the bed cover. I have priced both and the cost installed the way I want is pretty close with either tank.

So I am looking for some advice from those who may be more knowledgable or experienced and would appreciate any comments on my decision. Thanks for your thoughts.

Keith
Tow Vehicles
  • 2naEagle's avatar
    2naEagle
    Explorer
    Sep 18, 2018
    I agree with everyone except Cummins12V98 (sorry man). I absolutely love my auxiliary tank and will not be without it.
  • Cummins12V98's avatar
    Cummins12V98
    Explorer III
    Sep 18, 2018
    To each their own. Today’s Truck Stops are very nice. They are convient and I know I can easily maneuver my 41’ 5er especially when I am double towing my MC trailer. Sure they can be more expensive, I really don’t care. I stopped tripping over dimes long ago. When I get to camp I really don’t want to have to go to town for fuel.
  • fj12ryder's avatar
    fj12ryder
    Explorer III
    Sep 18, 2018
    I love my 40 gallon auxiliary tank, it allows me to pick my stopping points and don't have to spend time in noisy, stinky truck stops because I know I can get in and out easily with the 5th wheel attached. I fuel up at the end of the day after the truck is unhitched, easy peasy. And I figure I use fuel more often than I use tools. :)

    Since we use the truck almost exclusively for towing it sits for several months between usage. Usually from the end of October to the middle of May usually. If I can remember I put in some fuel treatment when I fill the tanks for winter, but sometimes I forget. It's never been an issue in over 8 years. I always keep the tanks full to lessen condensation in the tanks. Just old school thinking maybe, but so far so good.
  • Cummins12V98's avatar
    Cummins12V98
    Explorer III
    Sep 18, 2018
    I have 32 gallon capacity, I really miss the 35 I had on my pre DEF RAM. No way am I going to loose any of my tool box capacity with a fuel/storage tool box. So I modified a 5 gallon container to get rid of the BS "safety" features. I have needed to use it only once.

    "IF" i were to do anything it would be a TITAN 55 gallon replacement tank.

  • ksss's avatar
    ksss
    Explorer
    Sep 18, 2018
    I would not worry about condensation especially in Florida where the temp changes are not that drastic. I have a 50 gallon Titan in an 08 Duramax. I have 150K on the pickup and no issues. I would not want to lose the bed space but to each their own.
  • Bionic_Man's avatar
    Bionic_Man
    Explorer
    Sep 18, 2018
    I have a 60 gallon auxiliary tank in my truck. Bought it when my truck was brand new. Best upgrade I have done so far.

    My truck is used almost exclusively to tow, so it also sits during the winter. I haven’t had problems with fuel sitting yet.

    If I had a short bed I would probably want the replacement tank to save bed space. But that is a lot of cost for not a lot of extra capacity.
  • SDcampowneroper's avatar
    SDcampowneroper
    Explorer
    Sep 18, 2018
    We have an 85 gallon aux. tank with an electric pump for over 30 years. When traveling we buy diesel fuel at best price for the distance.
    When at home we empty it then refuel wih gasoline for the car, mowers, again at our price and convenience.
    Buying fuel in volume saves up to 20% Payed for that tank in no time. My truck is our gas station.
  • SDM's avatar
    SDM
    Explorer
    Sep 18, 2018
    I have a 30 gallon tank in bed. We only use in spring, summer, and fall. In the winter I keep 5 gallon so the tank has some action to help keep clean. When I need fuel I use the 5 in the bed tank and fill the underbed tank and put 5 gallon fresh fuel in bed tank. No problems in 12 years.

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