Found following add in the June 6, 1941 The Tribune-Democrat, Benton , Kentucky. ANNOUNCING GAS FOR LESS STATION THE FOLLOWING PRICES ARE GOOD TILL TUESDAY, JUNE 10 SUPER REGULAR GAS PER GALLON.......................................16c GENUINE ETHEL GAS PER GALLON........................................17 1/2c WASH OR GREASE JOB..........................................................75c ILLINOIS OIL CO NORTH MAIN STREET BENTON, KY. ROBERT BAILEY, MANAGER FORMERLY ROBERTS SERVICE STATION COME IN--LET'S GET ACQUAINTED ......................................................................................