Auxiliary Fuel Tanks

[lrdef110]

Looking at installing an extra fuel tank on the D4. Long Ranger have the 104 litre tank which comes with a gauge, but Boab through Opposite Lock have a stainless steel 80 litre tank without a fuel gauge. The latter is about $450 cheaper and does appear in the photos to sit well underneath. The 80 litre tank would suit me but wondering if anyone on here has one and what has their experience been with it. Any help/comments would be appreciated.
Cheers
Barry

[Tote]

I'm (hopefully) fitting a long ranger into the D3 Tomrrow. It seems well made. I'll post my experience tomorrow night.
Regards,
Tote

[sniegy]

Barry,
Do you have info about this tank?
Photo's, Website or anything, this sounds like a good option if you don't need to have a bigger tank.
Would also be nice to tuck away under the rear chassis cross member.
Cheers

[~Rich~]

LR Disco 3&4 Aux Fuel Tank 80L - Dolium Pty Ltd (http://www.dolium.com.au/Retail_Catalogue_page/FTLD3aux_item.html)
There you go. :)

[lrdef110]

Thanks Rich, beat me to it. Quote for this tank by Opposite Lock was $1,550 fitted compared to $2,150 fitted for the Long Ranger by ARB (these quotes include freight to NQ)
Barry

[ososlo]

OL in Sth Sydney fitted my extra tank on the D3 , the cost I will have to look up but it is gravity fed with no transfer pump.

The only issue is that the guage shows full until the extra tank has emptied and you start using the original tank (or so I am told when I queried why my guage wasn't working)

It is of 2mm steel so I haven't put a skid plate over it.

If you want I will dig out what it cost me...it was only a few weeks ago...the invoice is buried somewhere in the truck.

Cheers
Graeme

[lrdef110]

Thanks Ososlo, so say you have both tanks full, and you use most of the main tank, say 70 litres, how do you activate the transfer of the fuel from the auxillary?
Barry

[connock]

Hi ososlo
Just ordered my tank ( gravity fed ) I know a couple of guys that have this type on tojos and think there great, no electrickery no pump to fail etc . Just a question though how does it affect the range read out . Does it sit on say 700km or so until you start using the main tank? or what? We will both know soon enough I suppose

connock

PS lrdef110 Because it feeds into the main tank you would empyy the auxilery first then start the main tank , hence the fuel guage stays on full untill you start using the main tank.

[ososlo]

Hi Guys,

Because the new tank is higher (somehow..I went under there today to try and suss it out but couldn't see much) you go through the aux tank before you start using the original and hence getting the guage to drop.

I am on my 2nd fill since leaving Sydney and have been doing 8.3km/lt on the roads so far and haven't got down to using the original tank...both fills have been around the 70 - 80lts mark.

We are up in Noosa at present after spending the week on Fraser Is but my guage is still not working so I guess I am still on the new tank.

We are heading north in the morning via back roads and hopefully the Goomborian NP going by the map so maybe by the time we hit Hervey Bay we may be on the original tank.

It is a nice feeling having plenty of fuel with you...it would be better if you knew just how much!!

Time and keeping track of mileage I guess will sort that out.

[Graeme]

Just ordered my tank ( gravity fed ) I know a couple of guys that have this type on tojos and think there great, no electrickery no pump to fail
Do the transfer pumps actually fail?

[connock]

Do the transfer pumps actually fail?

Its a machanical part isnt it with moveing parts etc, to suggest it wouldnt fail is like saying my D3 will never break down ever. I think the D3 has enough things to break down without adding another, just my opinion :)

connock

[ososlo]

As I expected we have made it up to Hervey Bay and the fuel gauge is starting to work and is now sitting on 3/4's so I guess when I fill her up tomorrow I should fit the 90lts of the aux tank and 20lts from the original..110lts or thereabouts...I will let you know

Graeme

[Graeme]

Its a machanical part isnt it with moveing parts etc, to suggest it wouldnt fail is like saying my D3 will never break down ever. I think the D3 has enough things to break down without adding another, just my opinion :)

connock
I didn't ask if someone thought they might fail...

[ososlo]

Well I was a little out but not bad...I put 125 litres in the car today so that is the aux tank and about a 1/3rd of the main tank..

So at least we know once the aux is empty the gauge will start working and give you a more accurate idea of how much fuel you have left.

So..it seems like the Ol tank is not a bad option...simple yet effective

Now that we are at H Bay I have been able to give the car a tidy up and found the invoice for the tank from OL in its folder...It was $1185 plus fitting of $275 plus GST.

From the last fill we have travelled 949km which included Fraser Island and sand travel so 949km / 125lts gives us 7.5 km/lt..bearing in mind we are fully loaded with a water tank inside and roof tent and awning on the top is not too bad.

The aux tank has been a worthwhile addition

[NavyDiver]

Thanks Rich, beat me to it. Quote for this tank by Opposite Lock was $1,550 fitted compared to $2,150 fitted for the Long Ranger by ARB (these quotes include freight to NQ)
Barry


I put the Opposite Lock one on my D3. The spare tire went on a roof rack then off again after the other half forgot to lower the suspension coming into the garage- Yep 15mm to high!:eek: Just put a spare wheel carrier on the back. Wonder if people think it is not a D3 now:D
The tank is great. The fitting is very sturdy. Opposite Lock Mitchem Vic suggested it is fine for a bit of belly scrapping. The tank drains into the main tank almost perfectly so my fuel gausge stay at 100% for about 800km before the main tank starts to drain:)

A lot better and safer than carrying JERRYs :):)

The beast (my wifes name for the D3) is getting about fully worked up now.:D

[101RRS]

For these tanks how is the fuel content of the auxiliary tank displayed inside - via switch through the standard fuel gauge or is there a separate gauge. If the latter, anyone got a pic?

Thanks

Garry

[Graeme]

With the various aux tanks fitted, can fuel be directed to only the main tank when filling for normal use so as to not carry the extra weight unless required?

[NavyDiver]

With the various aux tanks fitted, can fuel be directed to only the main tank when filling for normal use so as to not carry the extra weight unless required?
Hi Graeme
I put 100 litres into almost empty main and AUX tank yesterday. The fuel goes into the AUX tank then drains into the main tank.
The main tank is showing 100% today so little if any of the 100 litres is in the AUX tank. I guess you could put two filler caps/ pipes but I don't think you would have any reason to do so. If you had pumps between the tanks like a Patrol you would need that. The KISS principle of gravity feed to the main tank works perfectly so you do not need to carry any more fuel than you want to. I fill it to max any time I see cheap prices or for a big trip and only top up the main tank otherwise:) I agree carrying 200kg of fuel is not needed most of the time. Gravity works for me on my D3.

[Graeme]

Thanks. A disadvantage would be that you never know just how much fuel is on board unless both tanks are full as there's no feedback from the gauge until some has been used from the main tank. In practice it might not be a problem though because if starting on an excursion that needs a full tank to get back home, add enough to what-ever is already showing on the gauge. I occasionally do a 900 km round trip that my D2 would do on 1 tank but the D4 wont, so it would be good to only put an extra 20L in at the start.

[Tote]

As promised above some pictures of the instalation of my Long Ranger (distributed by ARB ) tank. Installation was straightforward if time consuming and the instructions were good although they do assume some knowledge of fitting accessories.

Tank with hoses fitted prior to installation

http://i4.photobucket.com/albums/y127/toteau/D3%20Fuel%20Tank/IMG_3483.jpg

Fuel filler before modification, this picture with the flare and inner guard removed.

http://i4.photobucket.com/albums/y127/toteau/D3%20Fuel%20Tank/IMG_3481.jpg

New filler assy fitted

http://i4.photobucket.com/albums/y127/toteau/D3%20Fuel%20Tank/IMG_3486.jpg


Route for wiring for fuel gauge / transfer pump switch. This differs from the install instructions which suggest you run the cable externally and drill a hole in the drivers side floor. Cables are easy to run under the kick plates to the drivers side kick panel where they are routed up to the dash and there is an existing grommet in thgis position.

http://i4.photobucket.com/albums/y127/toteau/D3%20Fuel%20Tank/IMG_3487.jpg


The finished product

http://i4.photobucket.com/albums/y127/toteau/D3%20Fuel%20Tank/IMG_3488.jpg

It took me a leisurely day and a bit to fit, the most time consuming part being fitting the gauge and wiring. The instructions suggest 5 hours, and you could do it in this time with a hoist and a helper. Overall happy with the tank except for the hose clamp that I had left loose which meant I had to pull off the wheel and the inner guard to tighten tonight.

Regards,
Tote

[101RRS]

Hi Tote - what is the fuel gauge arrangement in the cabin? Got a pic of the arrangement?

Thanks

Garry

[Tote]

Hi Tote - what is the fuel gauge arrangement in the cabin? Got a pic of the arrangement?

Thanks

Garry

Here you go
https://www.aulro.com/afvb/images/imported/2011/07/1275.jpg


And a link to the site: :: The Long Ranger :: Land Rover Discovery 3 (http://www.thelongranger.com.au/discovery3longrangefueltank2.html)



Regards,
Tote

[101RRS]

Has anyone fitted either the Long Ranger, the Opposite Lock or Davis Brown tanks to their RRS. I have rang both Out of Town, Opposite Lock and Brown Davis (they have a 120l tank for $1495 supply) but neither will confirm or deny these tanks will fit - they should but I want to be sure.

Thanks

Garry

[bbyer]

The wheelbase of the RRS is less than the D3/4 but the spare tyre setup appears to be the same so an aux tank would probably fit.

The question is however the filler arrangement. I would think the gas tank fill port layout for the RRS would be different than the D3/4. The differences may or may not matter - that would be the real question depending upon brand chosen.

[101RRS]

Opposite Lock rang me back and said that their tank definitely will not fit a RRS - something about the floor above the spare wheel being a slightly different shape. Out of Town (Long Ranger) and Davis Brown have not tried to do a fitting in a RRS so cannot confirm or deny.

Garry

[rwlse]

The trouble with aux fuel tanks is that they cost a lot of money . you use them ocasionaly. and they usualy go somewhere where something else should be.
Eg. a spare wheel stuck on your rear bumper bar.UH!!!
After a lot of messing around I came across a Boab 50 litre fuel tank that will fit across the back of the rear seat.
I have it fitted to a wooden base which is part of my experdition set up ,fridge ,tray lockers etc.
The tank is fitted with a tap which is plumped to the fuel tank filler pipe.
To decant I turn on the tap and release the fuel cap. while having a cup of tea.
The beauty of this simple system is that after the trip.the system is simply removed.and put in store till the next trip.
Oh and it cost about $340 .00

[101RRS]

After a lot of messing around I came across a Boab 50 litre fuel tank that will fit across the back of the rear seat.
I have it fitted to a wooden base which is part of my experdition set up ,fridge ,tray lockers etc.

The beauty of this simple system is that after the trip.the system is simply removed.and put in store till the next trip.
Oh and it cost about $340 .00

Or use 3 jerries strapped to a wooden base for about $150.

I agree with your comments about aux tanks etc but then it is a cost benifit analysis for each person to consider. I could fold my rear seats down and fit 5 or 6 jerries on top in a suitable restraint system but would prefer a aux tank if one one available - $1500 vs the cost of the jerries I already own.

Garry

[ososlo]

I had a thought about the occasional use of the aux tank as mentioned earlier in the thread.

If you have an aux fitted but only use the original 80 - 90lts won't we risk getting water into the fuel via condensation from the empty aux tank?

Just a thought

Graeme

[gghaggis]

Opposite Lock rang me back and said that their tank definitely will not fit a RRS - something about the floor above the spare wheel being a slightly different shape. Out of Town (Long Ranger) and Davis Brown have not tried to do a fitting in a RRS so cannot confirm or deny.

Garry

Phone them back! OL have just received the new 80L tank for the RRS.

Personally I've gone for removable poly-tanks in the rear cargo area with a false floor over them. Gives 120 ltrs and I only have them in when I'm doing long trips. Presently it's not plumbed into the main tank (as I want it easily removable) - I have to fill (via a sure-flo pump) from the aux to the main manually.

Cheers,

Gordon

[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.

[Preacher]

After a lot of messing around I came across a Boab 50 litre fuel tank that will fit across the back of the rear seat.
I have it fitted to a wooden base which is part of my experdition set up ,fridge ,tray lockers etc. RWLSE quote

Is this legal or indeed the right thing to do - carrying Diesel inside the vehicle???
I have been wondering - as the Long range tank PLUS the wheel carrier is a very expensive addition. What are the Forum thoughts on this 50 ltr Boab - it certainly would be a much cheaper option???

dj

[~Rich~]

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)

[Graeme]

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.

[ADMIRAL]

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.

[Graeme]

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

[Beerenton]

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.

[Geedublya]

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

http://www.thelongranger.com.au/ta62a_tech.html
https://www.aulro.com/afvb/images/imported/2011/07/1275.jpg

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.

[Beerenton]

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.

[rwlse]

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.

[NavyDiver]

Thanks. A disadvantage would be that you never know just how much fuel is on board unless both tanks are full as there's no feedback from the gauge until some has been used from the main tank. In practice it might not be a problem though because if starting on an excursion that needs a full tank to get back home, add enough to what-ever is already showing on the gauge. I occasionally do a 900 km round trip that my D2 would do on 1 tank but the D4 wont, so it would be good to only put an extra 20L in at the start.

Just found another possible disadvantage for the gavity feed Opersite lock tank on my D3. With my main tank full and second drained by having a long trip and lot of fun in the mountains, I started up a BIG very steep climb which took about an hour. I noticed the fuel gauge droping untill it was down to under 1/2 full. The fuel had drained back from the main tank into the second tank. I wonder if it might leave the car staved of fuel if it was not a full main tank when I went up? It would not be funny to run dry with 90 litres in the back tank!:eek:
I will fit a one way valve after that interesting expiriance! Once level the tank refilled from the aux tank.
Another thing which was funny was economy. Going up was at 15 litres per 100km. Down was showed 0 litres for most of the trip untill it finaly creeped up to 2.3 litres per 100km:D

[bbyer]

The Ford pre 1926 Model T's had a similar concern - the engine could be starved of fuel going uphill when the under seat fuel tank level was low. The solution was go go uphill in reverse.

After 1926, the gravity feed fuel tank was moved from under the seat to in front of the firewall and higher up.

They were not much for hauling trailers in those days.

[lrdef110]

Hi Weakestlink, I'm close to fitting a Boab aux tank and was wondering if you could help with a couple of questions:

1. If the aux tank gravity feeds to the main tank do you have difficulty filling up if you only have a few litres left in the main tank? I'm thinking it could take some time for the rear tank to gravity feed into the main tank.
2. Have you found a non-return valve to fit in the 32mm hose which connects both tanks? If so does it or will it restrict the flow when you are filling up both tanks, and what brand / spec non-return valve have you used.

It would be a pain as you say to find all the fuel flows back into the rear tank and potentially leving the vehicle out of fuel.

Cheers
Barry

[NavyDiver]

Pleased to help with your questions Barry

1. If the aux tank gravity feeds to the main tank do you have difficulty filling up if you only have a few litres left in the main tank? I'm thinking it could take some time for the rear tank to gravity feed into the main tank.
Not found any problem at all with this. Just after fitting I had a very low main tank and put 180litres in to both with no blow back or issues in slow filling. used a HI Flow a few times- no problem noted.

2. Have you found a non-return valve to fit in the 32mm hose which connects both tanks? If so does it or will it restrict the flow when you are filling up both tanks, and what brand / spec non-return valve have you used.
Not yet but still on my to do list-

It would be a pain as you say to find all the fuel flows back into the rear tank and potentially leving the vehicle out of fuel.
Honestly I doubt it would be a problem unless really low on fuel and running up a mountain. I noticed it only on a very long very steep climb. A rule I have is to always have 1/3 remaining fuel for an emergancy, from my ofshore boating bad habits I guess. 30 litres or even less even if most drained back to the rear tank should give me more than enough left covering the fuel pick up in the main tank. I will put a one way valve in as I like to spend a lot of time on hills in in a very reclined seated possition:D

Cheers
James

[NavyDiver]

The Ford pre 1926 Model T's had a similar concern - the engine could be starved of fuel going uphill when the under seat fuel tank level was low. The solution was go go uphill in reverse.

After 1926, the gravity feed fuel tank was moved from under the seat to in front of the firewall and higher up.

They were not much for hauling trailers in those days.

If my main drains to my AUX and the car stops i might just consider trying the reverse up the mountain trick:D:D:D:D.

[NavyDiver]

Hi Weakestlink, I'm close to fitting a Boab aux tank and was wondering if you could help with a couple of questions:

1. If the aux tank gravity feeds to the main tank do you have difficulty filling up if you only have a few litres left in the main tank? I'm thinking it could take some time for the rear tank to gravity feed into the main tank.
...
It would be a pain as you say to find all the fuel flows back into the rear tank and potentially leving the vehicle out of fuel.

Cheers
Barry

Hi Barry, quick update for you. With the low fuel light on today (about 6 litres left) I put the car nose up on a 35 degree slope near a oval here. Ran it for 30 minuters with no drop in the fuel gauge or engine issues. Bumped it slowly it up and down the slope with my nose up at all times for another 10 minutes. It looks like only some fuel can get back the AUX tank. Give play time test I might not bother with a one way valve:D

[101RRS]

In the UK they have been taking out the main muffler (mainly V8 RRS) - the one that is opposite the fuel tank and is nearly as large and putting a smaller muffler elsewhere in the system. They are reporting some reasonable power increases.

However if this muffler was removed I suspect an aux tank of somewhere about 70 litres (RRS maybe more in a D3/D4) could go in. Would probably work out a tad cheaper than a rear tank and wheel carrier if a centre tank was to be made available.

Has anyone considered this possible option?

Garry

[denwol]

LR Disco 3&4 Aux Fuel Tank 80L - Dolium Pty Ltd (http://www.dolium.com.au/Retail_Catalogue_page/FTLD3aux_item.html)
There you go. :)

Been reading this thread and like the gravity fed idea. Went to the above link that was near the start of the thread.
Is this the right one? The one in the link says it comes with a transfer pump. Is this right?

[connock]

Hi denwal
If it has a transfer pump its not the gravity fed one:)

connock

[lrdef110]

Hi Denwol. I purchased my aux tank through Opposite Lock. I thought it was to be a Dolium tank but it actually came out of a manufacturer in WA. Not sure of the name. This may or may not be connected with Dolium. It is gravity feed and so far I am very happy with it, although the local Opposite Lock store had to use alternative hose to connect the tanks as the hose included with the kit was crap. After looking at the design and the way it gravity feeds into the main tank I am pretty sure that the fuel can not completely drain back to the aux tank. Total cost fitted was only $1,135 which is about half the cost of the Long Ranger tank which has the transfer pump, alouth the Long Ranger tank holds an extra 22 litres.
Cheers
Barry

[AGRO]

Gravity feed long range tank fitted by OL in WA is supplied by Outback Accessories at Jankakot. They have a website but it is not too specific. They also do a solid Spare wheel Swing Arm.

I have both and have no problems after 12mths, 30k kms and a few rough kms.

Apparently there is a one way flap valve between the two tanks which does not allow fuel to move out of the main tank. There is one fill through the auxiliary tank which then fills the main tank. Simple.

As a point of interest I loaded 176 liters into both tanks when the low fuel warning light came on. So I assume the combined capacity is about 180+ liters since the low fuel warning light supposed to come on when there is 10-12 liters left in the main tank (according to the LR manual).

[lrdef110]

So AGRO if the main tank is 82 litres odd, then the aux tank must be more than 80 litres based on your experience.
Cheers Barry.

[Redback]

So AGRO if the main tank is 82 litres odd, then the aux tank must be more than 80 litres based on your experience.
Cheers Barry.

It's 108lts

OL supply the Dolium 80l or 108lt aux tank, we are having the 108lt tank fitted by OL Kogarah.

Baz.

[Cairns Rob]

I have a Long ranger tank fitted to my D3 HSE has guage and transfer pump. Can't fault it, handy to know how much fuel onboard. I fill aux tank and pump to main then run main till light comes on when around town. 1600klms when touring from both tanks. Cheers Rob