This means a couple of things: those places don't have 93, and the mileage you get out of a gallon is less.
I wish the government would ban 2 stroke engines (like leaf-blowers), which would have a much larger effect on air quality, vs using CA's oxygenated gas.
Here's a list of the states that require reformulated: https://www.epa.gov/gasoline-standards/reformulated-gasoline
And here's a shorter list of those with areas requiring boutique formulations: https://www.epa.gov/gasoline-standards/state-fuels
My belief is that all the rest only require the basic federal standard, which results in a map like this with a lot of states in gray: https://www.eia.gov/todayinenergy/detail.php?id=67464
But if I'm wrong, I'd love to be corrected. What do you have for sources that support your assertion that "every state has their own gas"?
California being on the path to high prices this year was all over the news last year [5], but nobody seems to remember that, instead blaming it all on the Iran conflict.
[1] https://www.eia.gov/todayinenergy/detail.php?id=65704
[2] https://calmatters.org/politics/2025/08/oil-compromise-calif...
[3] https://www.yahoo.com/news/politics/articles/california-high...
[4] https://www.americanenergyalliance.org/2026/02/newsom-import...
[5] https://www.forbes.com/sites/davidblackmon/2025/12/07/newsom...