When I was renting car in Europe, US or Canada, I never was thinking or wasn’t care how much fuel I can fill into car tank. Usually was no problem to find gas station near by. But in Australia is different story. Unless you travel on East Coast or South West near Perth in other places distances between gas stations (or roadhouses) can reach 400km. Once I rented camper van with which I could travel max 350km, so I needed to fill it up in every roadhouse, otherwise my trip could end up somewhere in the middle in nowhere. So always check what is range of your rented car and may be ask for spare fuel tank just in case, as it can be difficult to get help in remote places with not much traffic.
