I can still get 98 from caltex and shell and mobil in SE melb yesterday. I know of shortages in brisbane due to problems at some refineries, but have not heard of shortages in sydney and melb. What i observed is, some stations put 'not in use' signs on some premium pumps regularly, every tuesdays and wednesdays. When you ask, they will give some 'faulty pump' 'out of petrol' reasons. I recall a few months ago, on today tonight, some stations are faking those reasons, to prevent people from using those pumps... Limiting 'loses' during those heavily discounted days.