The Shell Food Mart at the corner of Singleton and Harbins roads is a gas station that also has a taqueria inside it. Along with gasoline, oil, anti-freeze and convenience store items, here you can also find tacos, burritos and other food items. This Norcross Shell Food Mart also has an air pump for tires and a car vacuum. As the only store across the street from the Dollar General, Shell Food Mart is easy to spot.