In general most national recognized brands are considered to be stand-alone gas stations. For example, Shell, BP, Sunoco, Lukoil, and Gulf stations are considered stand-alone gas stations since their main business is selling gas even though they may sell snacks and drinks.
The gas pumps which do not count as stand-alone gas stations are the ones that belong to discount stores, superstores or warehouses. For example, Costco and Walmart have their own gas pumps at certain stores but they would not be considered a stand-alone station.
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