Once a crude oil supplier, the original Sunoco business expanded rapidly, producing, transporting and storing oil as well as refining, shipping and marketing petroleum products under the name of The Sun Oil Company of Ohio. The next decades would see Sunoco involved in ship building and mining, being publicly traded on the NYSE, and expanding to 4,900 convenience and gas locations across America. Get a free Nathan's Hot Dog at participating APlus at Sunoco locations to celebrate National Hot Dog Day.