Comment: federal tax on gasoline is a FIXED 18.4 cents per gallon

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federal tax on gasoline is a FIXED 18.4 cents per gallon

The United States federal excise tax on gasoline is 18.4 cents per gallon (4.86 ¢/L) and 24.4 cents per gallon (6.45 ¢/L) for diesel fuel.

The state and local tax figure includes fixed per gallon taxes as well as taxes that are a percentage of the sales price.

https://en.wikipedia.org/wiki/Fuel_tax

So only State and local tax as a percentage. If there was some sort of "peak oil conspiracy" I think it would be at the Federal level