In a large, heavy bowl, mix warm water and sugar. Sprinkle yeast in and stir to dissolve. Let stand until mixture bubbles, about 10 minutes.
Add flour, 4 1/2 tablespoons oil, and salt. Stir to mix thoroughly, about 1 minute.
Transfer dough to floured surface; knead until smooth, about 5 minutes. Spray large bowl with oil. Transfer the dough to the prepared bowl, turning to coat with oil. Cover bowl with plastic wrap.
Let dough rise in warm draft-free area until doubled in volume, about 1 hour.
Punch down, cover with plastic wrap and refrigerate 1 hour before rolling and baking.