With lower state taxes on gasoline, among others, Missouri is easily undercutting its border mate, Illinois, when it comes to the price to fill up.
One of the cardinal rules about interstate travel through the Midwest: "gas up before you hit Illinois." Illinois levies a hefty 42 cents per gallon tax on gasoline, among the highest gas taxes in the country.
Check out more of this feature on the Missouri-Illinois border wars for cheap gasoline by our own Adam Allington. It aired on Marketplace Morning Report earlier today.