GLOCO - Good Luck Oil Co. Early 1930s Tanker Truck Sign. This Sign Hung on The Driver and Passenger Door of Gloco Delivery Trucks. In the Early 30s Their were Very Few Gloco Station's. They Opened their 1st Station in 1931. Their were Only a couple of Delivery Trucks to Supply the 1 st Stations. Measures 20" * 12"