Auxiliary tank recommendation for D4

Gents, an interesting read. I have just fitted an Opp Lock (Outback Accessories) 85l tank (siphon fill) - instructions woeful but got there in the end and no leaks so far...


Quick question however, does the trip computer (range) recalibrate itself or can it be reset to take into consideration the additional fuel? I did not fill fully as wanted to minimise draining if leaking, so the front tank showed 3/4 when I left the bowser. By the time I got home it was showing full (must have a one way valve) which suggests that the range may show full until the rear tank is drained and then reduce as normal when the OE tank runs down.


Thanks,


NT

Fuel gauge will show full until you have emptied / drained the Outback Accessories tank, and trip meter will not allow for the extra fuel that you are now carrying.

I have the same tank on mine.

You might want to check the capacity though. I was told that mine was 85 litre when I bought it. It is closer to 100 litres.

Best thing about it has been the ability to get past some of the more expensive fuel stops in our travels. Got from Norseman to Port Augusta without stopping for fuel last time we went across that way. And that was with car loaded for trip to Tassie and tent / camping gear on the roofrack. Admittedly, we did have a pretty stiff tail wind most of the way across. :D

Just keep in mind - if you hole a siphon based tank you'll lose all your fuel...

Pump transfer gives a couple of benefits:
1. Knowledge of exactly how much fuel you have
2. Redundancy - hole a tank the other still has fuel
3. Pre-filtering; I only fill the rear tank and then pump across through the additional filter when traveling. Helps catch water, mud and other contaminants before they hit the primary fuel system.

May be a silly question but do people reckon getting an aux tank worth it.

I am on the verge of committing myself to one but was asked by the lovely wife if it was all worth it and would I use it.
She asked this just after I have spent the last few days building a false floor for the fridge slide. In doing this I have assumed the wheel would no longer be underneath the car😭

I tow a van and will hopefully hit the road for some extended trips soon.

Richard

With Camper on the back and a head wind we made all of 380km before we needed fuel in the main tank...

So yes... Damn handy and pay back using cheaper fuel is quick.

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Originally Posted by Tombie

With Camper on the back and a head wind we made all of 380km before we needed fuel in the main tank...

So yes... Damn handy and pay back using cheaper fuel is quick.

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Ta,
Good point. I also like your points about the benefit of pumping fuel across as opposed to gravity feed.

There is nothing worse than driving and worrying if you have enough fuel.

RIchard

It all depends on where you are driving, across the French Line / Simpson you can get by with just a couple of Jerry cans. ( In a diesel) I carried 260ltrs into the Geographical centre of the Simpson so anything less than a long range wasn't going to do it.

Another plus for a long range tank is that you can fill up in larger centre with cheaper fuel and drive further without the need for refilling.

A negative is off road damage done to it!

I got an LRA tank in my D3. I recently had to replace the transfer pump. The pump was mounted up on top and behind the rear diff and you can't get to it with the tank in place. It wasn't all that bad getting it out, but putting the tank back in was a pain. I also found some damage to my sender wiring, replacing that sorted out my dodgey aux tank level gauge reading? 100l exactly was required fill from dead empty.

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Originally Posted by ~Rich~

A negative is off road damage done to it!

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Rather scuff and scrape the (made for it) tank, than the spare tyre :)

Shane has a point and the Long Ranger (OOT4WD) tank has the pump in front, changing isn't too difficult at all.
They also upgraded to a stronger faucet pump which is far more resilient.