Is a dumn question?

G'day, what roads or tracks are you using? If staying on the tar, No, you won't need to carry extra fuel, plenty of fuel. Enjoy your journey.

Not if it's a diesel.

No, just make sure you fill up at Glendambo. You may not make it from Pt. Augusta to Coober Pedy if there are strong head winds on that day. In fact, fill up at most every fuel stop & you'll be OK.

Carrying extra fuel is only warranted when the remote service stations are making a big killing out of pricing their fuel.
Extra fuel is extra weight to carry, and this has an effect on your fuel consumption.

However, if the remote places are making a welter out of pricing - and you can get fuel with a major discount in the city (shopper docket + a day when fuel price cycle is low - then carrying extra fuel probably pays off, particularly if you aren't loaded right up with gear.

The downside is the need to add fuel from jerrycans, which often results in spills or splashes, and the annoyance of fuel smells inside the car.
My missus is highly sensitive to any chemical smells, and it doesn't go down too well to climb back into the car smelling of petrol or diesel from spills or splashes.
I think I only refuel from jerry cans about 2 times out of 10 without a splash landing on me somewhere!

Don't forget to check your tyre pressures and even raise them 2-4lb (14-28 kpa) for high speed, long distance travelling. Correctly-inflated tyres will do a lot to help your fuel consumption - as well as driving at a constant speed. I also like to try and pick a day with a tailwind, which can make a noticeable difference in fuel consumption.

Cheers - Ron.

Hi johno59, I did that trek last June with my xTrail, towing a camper. We stayed on the black top all the way and did it just fine. We made a point of filling up every 350lkms whether we needed it or not. I also agree with adjusting your tyres, I had put new ones on and they were rated higher than the old ones so I was able to up them a bit more than I normally would have. Enjoy your trip.
Rob