1. In a mixing bowl, combine the flour, sugar, salt, and instant yeast.
2. Add the warm water and vegetable oil to the dry ingredients.
3. Mix until a dough forms, then knead for about 10 minutes until smooth and elastic.
4. Place the dough in a lightly oiled bowl, cover with a damp cloth, and let it rise in a warm place for about 1 hour or until doubled in size.
5. Punch down the dough, divide it into 12 equal pieces, and shape each piece into a bun.
6. Place the buns on a baking sheet, cover, and let them rise for another 30 minutes.
7. Preheat the oven to 350°F (175°C) and bake the buns for 15 minutes or until golden brown.