Petrol / LPG duel fuel system

Evening Ryan,
Personaly I find it a no brainer, I drive a 94EFI GQ 4.2 and have the dual fuel in it. I find it fantastic. Not too sure about your fuel tank size as we have a 120litre gas tank which has around 90litres usable capacity and also have a 90 litre petrol tank, with the two of them we can certainly get to and from most places without too much worry. Considering the cost of fuel I would be looking at the 4.2 even if I had to swap the petrol tank out with a larger capacity one, as the saving on fuel being able to run on gas really makes it worth it. We dont find any difference in performance when running on gas and get around the same mileage per litre on both. There are several sites/postings on fuel availability for both petrol and gas so you may want to do a search and check the availability of gas and do a bit of pre trip fuel planning. But even if you needed to carry a couple of jerry cans to get you through the long hauls without gas, I would still recomend it.

This IS ONLY my view and there will certainly be several others with their own.
Good luck either way, let us know how ya go.
Go the trols.

If you ask at servo's they can give you a leaflet showing LPG sites in your state. I'm sure the websites would also have information for Australia wide.

I think the only drama is one stretch of the Nullabor and some parts of NQ and NT.

its a no brainer(no offence)
go the 4.2 duel fuel.
the rb30 is pretty gutless(i know i own one)and uses as much as the 4.2 on petrol.
as for the smaller fuel tank just carry a couple of jerry cans where the distance is to far between fill ups.
lpg is available in most bigger towns.
the other thing to think about is an rb30 patrol is worth nothing so drive one and see if your happy with how the power goes and with the saving over a 4.2 you should be able to convert to lpg with change.
the rb30 are pretty bullet proof and do have a little power if reved hard.
cheers

Go the dual fuel route and endvour to get bigger tanks. LPG supply is not really an issue and I live the the north of WA. I tow a very large heavy van - not a problen performance wise on gas - and as cheap as a diesel - even at 82c/l lpg price up here. Closer to civilisation where lpg prices are 40 - 50c/l you will be smiling every time you fill up.

GB

If you have your mind made up between these two,,, i would go the 4.2.....
The 3-litre is shocking up long hills in top or 4th gear....Absolutely no torque at all but plenty of power if you want to rev it like a V8 supercar......
Either of these cars on LPG will have their cylinder head problems one day when you dont expect it...(past experience).....
They both give around 20 litres per 100 on petrol.....
If you have a 50litre aux fuel tank you will expect approx 200kms or less before you are seriously looking for a fuel stop...

Go the 4.2L the 3.0L is a slug. I used to own one (for about 4 weeks)