#39. Shôn Ellerton, May 10, 2019. Anyone driving a petrol-engined car in Australia will be familiar with massive fluctuating petrol price differences. Many of us simply grumble that the petrol retailers are colluding with each other to rip us off. Instead, what can you do about it? https://shonellerton.substack.com/p/you-too-can-discourage-petrol-price