In 12-inch skillet, heat 2 tablespoons of the oil over medium-high heat. Add 2 biscuit rounds to skillet; cook 30 seconds to 1 minute on each side or until light golden brown. Repeat with remaining biscuit rounds, adding more oil as needed. Drain on paper towels. Sprinkle one side of the biscuit rounds with the remaining 4 tablespoons sugar.