Just a note aside here.
Fuel (diesel) prices lately have been around the $1.54 mark in most of the lower towns of WA. We were warned that fuel going across the Nullarbor was going to be expensive, so we tanked up in Kalgoorlie including a spare jerry can at $1.46 (4c discount included) and then again in Norseman at $1.64. Some places along the road were $1.92 & $1.96 but we made it nearly all the way, to Eucla, just before the SA border, where it was $1.82. Penong just east of Ceduna is our next fuel stop where we purchased some for the more reasonable price of $1.58.