Preheat oven to 375 degrees F. and grease a 12-cup muffin tin.
Toss cereal with sugar, flour, baking soda and salt.
In a separate bowl, whisk oil, egg and buttermilk. Add buttermilk mixture to cereal mixture and stir just until blended. Stir in blueberries and spoon into prepared muffin tin. Bake for 20 to 25 minutes, until a tester inserted in the center of a muffin comes out clean.