Home › Top 4 Gas Stations in Posen, Illinois Find best Gas Stations in Posen, Illinois, with all necessary contact information, including addresses, phone numbers, working hours, map locations, and website links. Exxon - Posen (IL 60469) US, Posen, IL 6046914038 S Western Ave Shell - Posen (IL 60469) US, Posen, IL 604693033 147th St Milen Amoco US, Posen, IL 604693144 147th St Citgo - Posen (IL 60469) US, Posen, IL 604693118 147th St