Sure making high quality gasoline is difficult, but making shitty gasoline or fuels that can take the place of gasoline with a bit less power is not some crazy

Sure making high quality gasoline is difficult, but making shitty gasoline or fuels that can take the place of gasoline with a bit less power is not some crazy technology. Gasoline engines, if tuned to do so, will run off naptha and ethanol mixtures. And if you are creating it fresh, like from the existence of a place called gas town, it will allow you to use more volatile but higher octane fuels mixed to make decent octane gasoline, it just won't last sitting around for very long. And methanol is fairly easy to produce from heating up nearly any organic matter up in a dry still. Diesel engines will run off nearly any oil that will burn. I mean sure, fuel refining knowledge isn't super common, but plenty of people still know enough about it and chemistry to less efficiently produce fuels as long as they have a source material, be it an actual oil well or enough organic materials, with some basic tooling. Tooling which we would already know exists by the fact that people are maintaining a fleet of vehicles. And you also have to remember that Max himself was alive and working in world pre-collapse, it isn't a world 10+ generations into an apocalypse, only like 2 maybe bordering on 3 generations of apocalypse with some people still remembering the old world, albeit in a decaying state. There are hippies that process wood into usable liquid fuels you can find on youtube. If we wanted to be more realistic, they would be driving less, and have a far higher percentage of diesel vehicles because diesel is so much easier to make and the engines are easier to run on even garbage fuels. But Mad Max isn't like 200 years post-apocalypse.