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- Illinois Chapter (https://www.ford-trucks.com/forums/forum122/)

- - no ethanol? (https://www.ford-trucks.com/forums/1036785-no-ethanol.html)

Anyone know where they sell, or if they sell, real gas around Chicago? 100% gas no ethanol?

I do not think you will have any luck finding pure gas with no ethanol
I think its a FED or STATE law to incorporate Ethanol(corn alcohol at 10%) to all unleaded grades of fuel.

I haven't checked recently, but I thought that BP Ultimate contained no ethanol. Their website mentions the following

"BP ULTIMATE OCTANE 98 minimum BP Ultimate is the highest octane retail fuel that BP has on the market. It has an octane rating between 98 and 100 and does not contain ethanol."

The octane mentioned confuses me because I thought that Ultimate here in the Chicago area was 92 octane. I'd recommend checking that the pump. They have stickers listing the octane and ethanol content. Good luck