Gas Mart ← View details 320 West State Street, O'Fallon, IL 62269 +1 618-632-8344 gasmart.mx Suggest an Edit Name* State* Locality* ZIP* Street address* Phone* Website Opening hours Sunday: 12:00 am — 11:59 pm Monday: 12:00 am — 11:59 pm Tuesday: 12:00 am — 11:59 pm Wednesday: 12:00 am — 11:59 pm Thursday: 12:00 am — 11:59 pm Friday: 12:00 am — 11:59 pm Saturday: 12:00 am — 11:59 pm Your comments * — Required information