FYI,
98RON BP Ultimate in Perth is 91c to 98c presently (over 5 days) -
seeing it is made here, it's rich.
Worst price I paid for Ultimate was $1.23 in Albany 500km from Perth.
I use http://www.fuelwatch.wa.gov.au/advanced_search.cfm to buy at the low part of the pricing cycle.
Presently:
84c ULP
89c PULP

It's called cheap taxes/BP fuel monopoly in Perth ;-)

Check the gateprice http://www.fuelwatch.wa.gov.au/terminalgate_price.cfm

Cheers,
blackSRi