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    information on gasoline and why 93 octane doesn't mean the same in every state

    MTBE, Oxygenates, and Motor Gasoline - EIA:

    https://www.eia.gov/outlooks/steo/special/pdf/mtbe.pdf

    EPA Gasoline Standards:

    https://www.epa.gov/gasoline-standards

    Reformulated gasoline (RFG):

    https://www.epa.gov/gasoline-standards/reformulated-gasoline
    https://nepis.epa.gov/Exe/ZyPDF.cgi/00000FG5.PDF?Dockey=00000FG5.PDF

    USA Gasoline Requirements:

    https://www.api.org/oil-and-natural-gas/wells-to-consumer/fuels-and-refining/fuels/us-gasoline-requirements
    https://www.api.org/-/media/Files/Policy/Fuels-and-Renewables/2016-Oct-RFS/US-Fuel-Requirements/US-Gasoline-Requirements-Map.pdf

    State Fuels:

    https://www.epa.gov/gasoline-standards/state-fuels

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