Thread: Auxiliary Fuel Tanks

They say you can, just vent it to the outside of the vehicle.
PDF from BOAB re fitting instructions:

User and Fitting Instructions for Universal Poly Fuel Tanks
Important Notes:
The BOAB range of universal fit Poly fuel tanks are designed for short-term storage and transport of fuel in
external protected locations in or on motor vehicles. This makes the tanks ideal for vehicles undertaking
expeditions and long distance travel.
Installations of fuel tanks should only ever be undertaken by qualified personnel using the resources of a
suitable workshop with particular attention paid to ventilation and protection from physical damage.
BOAB Poly tanks are Ideal for Diesel but can also be used with Petrol, however petrol installations require
very careful attention to ventilation and it is not recommended that tanks used for petrol be exposed to direct
sunlight.
Never fill the tank past the “Max Fill Line” – which is approx 20mm from the top of the tank.
Installation:
1. The tanks are a “universal” fitment, meaning that every installation will be different and therefore
detailed fitting instructions are not possible. The following points should be taken into account when
installing a BOAB Poly Fuel Tank.
2. The tanks should be secured with good quality tie down straps or other custom made brackets &
straps. Take care to avoid materials that could chaff the tank. Keep in mind the weight of a full tank
when designing the mountings.
3. Mount the tank only in a well ventilated location – ideally on the tray of a ute, truck or trailer. It is not
recommended to use any fuel tank on a roof rack.
4. If mounting the tank inside a vehicle, it should be contained within a fully sealed and ventilated
cabinet or bulkhead such that fumes or fuel cannot enter a passenger compartment.
5. The 50, 55 & 60 Lt tanks are fitted with a low profile breather fitting . This may sweat fuel if the tank
is over-filled or in off-road situations. Accordingly ensure the breather is away from any ignition
source or hot exhausts etc. If using the tank in off-road situations it is highly recommended the vent
be replaced with a connection into the vehicle’s standard fuel system as follows
If the tank is being installed into a semi-permanent installation the breather should be connected into
the vehicle’s standard fuel ventilation system by replacing the low profile breather with a brass hose
connector fitting and adding a length of fuel hose to connect into the vehicle's standard fuel tank
ventilation system with a suitable size T piece (may vary slightly depending on vehicle model and
application).
6. Fuel from the tank can be used in several ways, including:-
 Using a hose kit and fuel tap – remove the standard fuel cap and insert the drain hose and
transfer the desired amount of fuel whilst stationary.
 A semi permanent drain hose and tap connected into the original fuel filling system
 A hand or electric fuel pump connected with hoses into the original fuel filling system
Warning: NEVER attempt to syphon fuel using your mouth
Options and Parts:
Fuel drain hose and shut-off valve (Part No: FTU55PK)
Vent Extension Kit - Universal fit, extra parts may be required for some applications (Part No: FTUVK)
Replacement Cap (Part No: WTPCAP)

I carried 4 jerries of diesel strapped behind a cargo barrier inside a D2 for Madigans, and another out the back. My concerns were spillage on carpet and seats and the stink of diesel if any leaked, but no safety concerns. None leaked but they were used as soon as the tank allowed.

Originally Posted by mowog

I had my Long Ranger fitted because we tow a caravan. We did one trip without the AUX tank and it was a pain always looking for the next place to fill or figuring out if you will make it to the next stop.

I thought about jerry cans but I would prefer to carry extra water in jerry cans.

We tend to fill both tanks even around town with the D4 and mainly on cheap fuel days. The amount we use the D4 means that is around 2 months between fills.

Wow, wish I had your fuel usage. We have the Longranger tank, and also try to take advantage of the cheap fuel days. I think we average 2-3 weeks between fills. Have to lock it away from the other half for a month to get 2 months between fills.

My June fuel a/c shows 306 litres for the D4.

This may be a dumb question, but...
I've just bought an 09 TDV6 that has an aux tank, I think it's a Lone Ranger from the pics above (same tank shape and same dash switch). It was a government fleet car.

Is there a 'normal' set up for the dual tanks - transfer pump, gravity feed etc? Is it more likely that I have one over the other? Is there anything I can look for that might tell me easily?

I've had it 2 weeks and I haven't had to fill it up yet, but it's nearly empty now. I haven't even opened the fuel door to see if I have twin filler necks or not...

Thanks everyone, gradually finding my way around the car, and the forum

Cheers.

If it is a long Ranger you will have a little guage and pump button near your light switch.




The button operates the transfer pump to pump from the auxiliary to main. Turn pump off when red led lights on guage.
The long ranger uses the standard filler with 2 necks. The rearmost neck is for the auxiliary tank.

Thanks GW, yep that's my switch. I filled it up last week, found the 2 necks in the filler nozzle. I got 102L in the rearmost neck, and 75L in the front. $255 later! Did Adelaide to Mildura and return this weekend, when I got down to a quarter of a tank on the gauge I hit the pump button until it was about full again, then turned it off again.

Well we've been on our trip 5500kls. a great trip to Kurumba, via Longreach on the way up and via Cains on the way back. Pulling a two ton caravan, that usually gives me 400 kls usable fuel range.
This trip I used my newly fitted Boab 50 litre fuel tank. Brillant, it gave me an extra 300 usable kls range.
As I mentioned before the tank fits neatly across the back of the middle seat. It is plumped into the fue tank filler hose which is allmost directly below the Boab tank. The tank is also vented to the cars fuel tank,s breather at the point of filling.
It worked well. The only proviso is care in filling. I took great care and wrapped a rag around the filler when filling just in case there's a drip or two. The rag I kept under the bonnet. This ensured that there no Diesel smells in the car.
Next week end it will take me about 45 minuets to take it all out and go back to a 7 seater car
If any one want more please send me a message and I,ll get in touch.