https://www.news.com.au/finance/culture/inside-parliament/dont-panic-the-albanese-government-outlines-how-many-days-australia-has-before-it-runs-out-of-petrol/news-story/4e70d1a235eed0b252cb54027a16345c
Australia has 34 days worth of fuel reserves, but apparently some significant percentage of that is on ships coming here and could therefore be sunk or diverted.