In a large bowl, combine the flour and sugar. In another bowl, combine the buttermilk, oil and eggs. Stir into dry ingredients just until moistened. Stir in blueberries.
Fill greased or paper-lined muffin cups two-thirds full. Bake at 400° for 14-18 minutes or until golden brown and a toothpick inserted in the center comes out clean. Cool for 5 minutes before removing from pans to wire racks. Serve warm.
Editor's Note: As a substitute for each cup of self-rising flour, place 1-1/2 teaspoons baking powder and 1/2 teaspoon salt in a measuring cup. Add all-purpose flour to measure 1 cup.