Original oil and gas trade magazine vintage ad for SKELLY OIL COMPANY of Tulsa, OK. From Kansas Prairie to Petroleum Center. We could print millions of words describing Skelly's never ending efforts to better its products and services to the American public through the years. But we feel the above picture of our mammoth thirteen million dollar El Dorado refinery expansion project portrays these points far more graphically. A milestone in the highway of progress. This unique 1951 old petroleum products refining service station industry magazine advertisement would display beautifully matted and framed.