Need advice on Aux Fuel Tank

[Jim-n-Henri]

I am going to have to add an Aux tank for my F350 6.7 Thinking about in bed 50 Gal or so...I have looked at all the websites and combos...I have went from the TOP o Line Tool box combo with in cab indicator with internal transfer pump for about $1800 to a tank only gravity feed through splice into existing fuel hose $550 sold through Camping World with a $75 install fee.

I tend to "over buy" these things ,,, so my question is:

What is your experience with either type ? The high end guy told me that gravity drain tanks were only allowed by DOT on "commercial" rigs..yet CW ad states DOT compliant.

[Sundance07]

mileshuff wrote:
My stock Dodge holds 37 gallons. When towing I get 10mpg. Thats 370 miles. My legs and bladder can't handle driving any further so I'm gonna stop anyways. No need for an AUX tank for me!

For me it's about the ability to choose where I want or can fill up. My bladder still needs emptying but in Canada maybe 2 out of 10 gas stations are RV friendly. Perhaps in the US this is not as much of a problem.

That said, I have a 50 gal aux tank in the bed as well as my stock 34 gal tank. 84 Gal gives a nice range and comfort zone for me. I can fill on my terms at an "easy access" station....:)

[dave17352]

Lyle

Titan makes the plastic tanks. 50 (shortbed) and 62 gallon (longbed)
for the Late model Ford superdutys.

I love my in bed 50 gallon gravity fed fuel-tool box combo, But I will say a 60 gallon replacement tank would be something I would consider if I was going to make the decision again.

[mileshuff]

My stock Dodge holds 37 gallons. When towing I get 10mpg. Thats 370 miles. My legs and bladder can't handle driving any further so I'm gonna stop anyways. No need for an AUX tank for me!

[sdetweil]

laknox wrote:

Jim-n-Henri wrote:
I am going to have to add an Aux tank for my F350 6.7 Thinking about in bed 50 Gal or so...I have looked at all the websites and combos...I have went from the TOP o Line Tool box combo with in cab indicator with internal transfer pump for about $1800 to a tank only gravity feed through splice into existing fuel hose $550 sold through Camping World with a $75 install fee.

I tend to "over buy" these things ,,, so my question is:

What is your experience with either type ? The high end guy told me that gravity drain tanks were only allowed by DOT on "commercial" rigs..yet CW ad states DOT compliant.

Transferflow makes under-bed aftermarket tanks to replace the original tank. My '02 D'max can go from 25 to 45 gallons without having a tank in the bed. I =would= lose 1-2" of ground clearance, however. This is a steel tank. There used to be another company that made plastic under-bed tanks, but I can't recall the name, off-hand.

Lyle

Titan makes the plastic tanks. 50 (shortbed) and 62 gallon (longbed)
for the Late model Ford superdutys.

[laknox]

Jim-n-Henri wrote:
I am going to have to add an Aux tank for my F350 6.7 Thinking about in bed 50 Gal or so...I have looked at all the websites and combos...I have went from the TOP o Line Tool box combo with in cab indicator with internal transfer pump for about $1800 to a tank only gravity feed through splice into existing fuel hose $550 sold through Camping World with a $75 install fee.

I tend to "over buy" these things ,,, so my question is:

What is your experience with either type ? The high end guy told me that gravity drain tanks were only allowed by DOT on "commercial" rigs..yet CW ad states DOT compliant.

Transferflow makes under-bed aftermarket tanks to replace the original tank. My '02 D'max can go from 25 to 45 gallons without having a tank in the bed. I =would= lose 1-2" of ground clearance, however. This is a steel tank. There used to be another company that made plastic under-bed tanks, but I can't recall the name, off-hand.

Lyle

[richardcoxid]

On my last two Dodge/Cummins I had Aero Tanks install their 60 gal replacement tank. I like it that I have only one place to fill at, no valves to operate,only the factory gage and no control panel. The factory gage will read full for about 160 miles and 300 miles solo before it comes off of “full”. I can go about 500 miles towing and about 1000 miles solo all highway miles.

http://aerotanks.com/

Richard

[Dave___Ginny]

I have a 35 gallon direct draw fuel tank made by American Tank. I love this operation and it's been in 2 different trucks working flawlessly. Some folks don't see the need for an extra tank but I have found it takes too long to fuel in truck stops. Now I carry 70 gallons of diesel which usually only requires to be filled once a day. I've never had a problem with water in the fuel either.

I personally don't like the idea of transfer type of fuel tanks.

[rmalik1]

lillyputz wrote:
I have a compo 50 gal fuel and tool box by Transfer Flow with the auto transfer of fuel and monitor system. I have had it for 4 years. great system. it is flush to the top of the bed. would buy it again.

Lillyputz

I also have a transfer flow w/o the tool box and just love the sense of security it gives you and when you find cheaper diesel "fill'er up"!

[Beaker]

avvidclif1 wrote:

My apologies but the replacement tank is $1200. I'm not paying that for an additional 22 gal....

My thoughts exactly on that one

I would like to add an additional fuel tank but have a problem. On occasion we dry camp and I carry a Yamaha 4500w generator. Sits crossways in the front of the bed in front of the hitch and causes no problems. BUT it sits right where a fuel tank would. I can't find a tank made for behind the hitch or down the sides.

I have the Tranfer Flow 40gal fuel/toolbox, expensive but wouldn't be without it.

My Crossroads has a receiver on the rear that I will put a generator box on. Maybe yours is similar.

[johntank]

fj12ryder wrote:


I fuel up in the evening after I drop the trailer. And while traveling I can stop and take a break at a nice rest area instead of a nasty diesel truck stop. It's just all in what you choose to do.

This is one of the best answers to having an aux fuel tank I have seen, besides it is much nicer to walk the fur kid(s) at a rest area than a fuel stop. jmo

[FiverBob]

Love my RDS inbed tank. I did the gravity feed myself before they made the install kit. Had it for 10 years - - works beautiful - - would do it again just like the first time in a heart beat. And, wow, the difference in price compared to some of the others. Do it - - you will love it.

Bob

[elkabong]

When I begin a trip, I start with full tanks. I carry 85 gallons of fuel and 50 gallons of water. The weight of either or both gives me no cause for concern for my mpg or stability. Wind is another matter.
I like being able to refuel where I want, rather than where I must.

Ken

[GoPackGo]

Empty tanks can be worse then full tanks sometimes. Such as in a situation where you have fairly rapid and major temp changes like happens in the northern states in spring. And even then, if there was any water, it would show up in the bottom of the fuel filter so it could be drained. Lived and boated in Iowa for many years and never had any water problems. I don't think that having an empty fuel tank in the bed of my truck will automatically mean I will have condensation inside the tank. I still wonder why ONLY an aux tank would be affected but not a 3/4 empty OEM tank.

I carry 350 gallons of diesel in two tanks in my trawler here in Florida and have never found any water in the fuel. I burn 2 gallons/hour so I only refuel about once every other Presidential election.

Tim

[Me_Again]

GoPackGo wrote:
Thomasmnile said "Interesting point. Gave some thought to an auxiliary tank, wound up with just carrying 10 gal. in two 5 gal. cans in the bed. Enough to get me somewhere to refuel in the lower 48 and no worries about cultivating a fungus farm in an auxiliary tank when not towing. "

Fungus will only show up IF there is water in the fuel - it needs the water to grow. Why will there ONLY be water in the aux tank but none in the OEM tank ? Why wouldn't fungus blossom in those 5 gallon cans in the bed of your truck ?

And remember that you can (and I do) run with the aux tank empty when not towing. There is no rule that says you have to fill the aux when you fill up the OEM tank.

Tim

Empty tanks are worst than full ones. The walls of empty tanks get condensation on them(inside). In boats we add a biocide to kill the bugs. The other issue is that the ULSD does not store as well as diesel of yesteryear. Chris

[GoPackGo]

Thomasmnile said "Interesting point. Gave some thought to an auxiliary tank, wound up with just carrying 10 gal. in two 5 gal. cans in the bed. Enough to get me somewhere to refuel in the lower 48 and no worries about cultivating a fungus farm in an auxiliary tank when not towing. "

Fungus will only show up IF there is water in the fuel - it needs the water to grow. Why will there ONLY be water in the aux tank but none in the OEM tank ? Why wouldn't fungus blossom in those 5 gallon cans in the bed of your truck ?

And remember that you can (and I do) run with the aux tank empty when not towing. There is no rule that says you have to fill the aux when you fill up the OEM tank.

Tim