In a large mixing bowl, combine warm water and sugar. Stir until sugar is dissolved.
Add yeast to the mixture and let it sit for about 5 minutes, until it becomes frothy.
Stir in salt and vegetable oil.
Gradually add flour, one cup at a time, mixing well after each addition.
When the dough starts to pull away from the sides of the bowl, turn it out onto a floured surface and knead for about 5-7 minutes, until smooth and elastic.
Place the dough in a greased bowl, cover with a damp cloth, and let it rise in a warm place for about 1 hour, or until doubled in size.
Punch down the dough and divide it into 12 equal pieces. Shape each piece into a roll and place on a greased baking sheet.
Cover the rolls with a damp cloth and let them rise for another 30 minutes.
Preheat oven to 375°F (190°C). Bake the rolls for 12-15 minutes, or until golden brown.
Remove from oven and let cool slightly before serving.