I had a vehicle converted over to LPG back in the early 90's and I was very
hesitant doing so.
However once I did it, I was very happy with my decision.
I went from paying 60cpl for petrol to 19cpl for gas.

There was big concern even back then, that the government would get greedy
and add the excise tax onto the gas, but they never did.
I think they are stuck between a rock and a hard place about it. On one side
they are trying to encourage people to use gas for environmental reasons as
well as the fact the gas is produced 100% in Australia. BUT On the other
hand the more cars that do switch to gas = less fuel tax collected from
Petrol.

I am seriously considering having the Prado converted over to LPG but again
I find my fear of spending $3,000 for the conversion and then having the
government announce they are going to tax the gas.

I guess if they do make a move on it one day, and I am sure they will, then
they may have an offset tax so as to make themselves still look like they
are doing the right thing for the environment.
Kind of like an election promise and campaign. They go around hugging babies
with one arm while the other arm slips around and shoves a knife into the
parents back!

Garry