Looking to add an aux diesel fuel tank to a ford f250 in the bed to gain 30-50 gallons in addition to stock tank. I live in Arizona and am getting mixed information from a few auto shops about what is legal and what is not DOT approved for all 50 states.I am not a person that would under take this on my own so I would prefer to have it done by a auto shop.I have seen Tranferflow, RDS Alum. and a few others but not sure I understand which ones would really work and/or are legal.thanks for the comments.

After having "Transfer Flow" install 3 different aux tanks, I strongly recommend them.

Is your truck still in warranty? If so, I would talk to them first. With a F250 and pin heavy 5th wheel, you will have to watch your weights carefully. You could easily exceed your rear TV tire ratings. 50 gallons of diesel and tank could weigh in at 450+ pounds, with a lot of that on the rear axle. Chris

glraz wrote:Looking to add an aux diesel fuel tank to a ford f250 in the bed to gain 30-50 gallons in addition to stock tank. I live in Arizona and am getting mixed information from a few auto shops about what is legal and what is not DOT approved for all 50 states.I am not a person that would under take this on my own so I would prefer to have it done by a auto shop.I have seen Tranferflow, RDS Alum. and a few others but not sure I understand which ones would really work and/or are legal.thanks for the comments.Go to KSH in Lake Havasu city and have them make any size you want.chevman

Me Again wrote:Is your truck still in warranty? If so, I would talk to them first. With a F250 and pin heavy 5th wheel, you will have to watch your weights carefully. You could easily exceed your rear TV tire ratings. 50 gallons of diesel and tank could weigh in at 450+ pounds, with a lot of that on the rear axle. ChrisI weighed it on the last trip and rear axle is still under manuf. spec and 50 gal of diesel will add about 365#. Even if I did 30 i would be happy. Has a little time left on powertrain warr left but not much. I did buy truck used so have 2 years left on a 3/36k extended warranty.thanks.

larry barnhart wrote:glraz wrote:Looking to add an aux diesel fuel tank to a ford f250 in the bed to gain 30-50 gallons in addition to stock tank. I live in Arizona and am getting mixed information from a few auto shops about what is legal and what is not DOT approved for all 50 states.I am not a person that would under take this on my own so I would prefer to have it done by a auto shop.I have seen Tranferflow, RDS Alum. and a few others but not sure I understand which ones would really work and/or are legal.thanks for the comments.Go to KSH in Lake Havasu city and have them make any size you want.chevmanWould prefer to stay in Tucson or even Phoenix (if i had to) Lake Havasu would be a bit out of the way and by that time might as well pay the $$$$ for a local guy in Tucson to do the transferflow. Just seems like they want too much which is why i thought i would post here.thanks for the input.

Aux Fuel tank for Ford F250 | Good Sam Community

34 Replies

glraz
Explorer
Apr 30, 2013
Me Again wrote:
Is your truck still in warranty? If so, I would talk to them first. With a F250 and pin heavy 5th wheel, you will have to watch your weights carefully. You could easily exceed your rear TV tire ratings. 50 gallons of diesel and tank could weigh in at 450+ pounds, with a lot of that on the rear axle. Chris

I weighed it on the last trip and rear axle is still under manuf. spec and 50 gal of diesel will add about 365#. Even if I did 30 i would be happy. Has a little time left on powertrain warr left but not much. I did buy truck used so have 2 years left on a 3/36k extended warranty.

thanks.
larry_barnhart
Explorer
Apr 30, 2013
glraz wrote:
Looking to add an aux diesel fuel tank to a ford f250 in the bed to gain 30-50 gallons in addition to stock tank. I live in Arizona and am getting mixed information from a few auto shops about what is legal and what is not DOT approved for all 50 states.

I am not a person that would under take this on my own so I would prefer to have it done by a auto shop.

I have seen Tranferflow, RDS Alum. and a few others but not sure I understand which ones would really work and/or are legal.

thanks for the comments.

Go to KSH in Lake Havasu city and have them make any size you want.
chevman
Me_Again
Explorer III
Apr 30, 2013
Is your truck still in warranty? If so, I would talk to them first. With a F250 and pin heavy 5th wheel, you will have to watch your weights carefully. You could easily exceed your rear TV tire ratings. 50 gallons of diesel and tank could weigh in at 450+ pounds, with a lot of that on the rear axle. Chris
MarkTwain
Explorer
Apr 30, 2013
After having "Transfer Flow" install 3 different aux tanks, I strongly recommend them.

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Aux Fuel tank for Ford F250

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