Best Recipe - Pancakes

2 cups unbleached all-purpose flour (10 ounces)
2 tablespoons sugar
1/2 teaspoon table salt
1 teaspoon baking powder
1/2 teaspoon baking soda
2 cups buttermilk
1/4 cup sour cream
2 large eggs
3 tablespoon unsalted butter , melted and cooled slightly
1 - 2 teaspoons vegetable oil