In the little berg in the north west corner of IL, our 87 octane swill has been hoovering around $3.79 a gallon since about mid May. We get a few stations that drop a few cents a gallon every few days, but about every 2 weeks, someone jerks their chain and everyone is back at $3.79.
You can travel 30-40 miles in nearly any direction and save 20 to 50 cents a gallon. 20 miles north puts you in WI, and 60 miles west puts you in Iowa. Either of those states drop the cost another 20 cents per gallon.
Last summer, IL added 19 cents per gallon tax on gas that went into effect in Jan this year. Enough people raised enough stink, they rolled the gas tax back, and they rolled the tax on food back to only 1%. All those tax reliefs went away July 1st.
I'm going into WI tomorrow, I'll fill up the truck there and save around 60 cents a gallon over the local price.