If you drove your car across 17 countries in Europe would you expect to pay the same at every station you come across? I don't think what you're saying is even the norm within European countries, is it?
However, this doesn’t apply to gas stations in the US. The displayed price is always inclusive of all taxes and fees. I don’t think there are any states in the US where that isn’t true.
Which is why the comment above is illogical. The prices are posted on a big sign outside. The prices are posted in real time on the pump itself.
Equating gas stations to slavery can’t be a real comment, can it? This feels like someone who hasn’t been to the United States trying to tell a story about the United States being bad based on how they imagine it working.
States in the United States are more than just administrative districts. in the case of the first thirteen states, the predate the federal government.
Each one has its own elected government. They have their own criminal and judicial system, as well as their own tax regimes.
Apart from the tax regime though, some states are home to large refineries which produce gasoline and many states don't. The distance you are from the point of production of the gasoline also comes into play.
Sales tax on literally everything is fairly different state to state (and within sometimes) but petrol is a major daily thing that is tax inclusive.
I suspect the person above hasn’t even travelled to the US.