Dissolve yeast and sugar in warm water.
Add oil and half the flour; beat until smooth.
Add salt and remaining flour, or enough to make stiff dough.
Knead until smooth and elastic (5 to 7 minutes).
Place in oiled bowl, cover and allow to rise in a warm place for from 1-1/2 to 2 hours.
Punch down and let rise again in 30 minutes in a warm place (optional).
Divide in thirds, mold unto loaves and place in greased loaf pans.
Cover and let rise in warm place about 1 hour, or until double in bulk.
Bake at 450 °F for first 15 minutes, then at 375 °F for 45 more minutes.
Remove from pans, brush with oil and cool on rack.
Yield: 3 loaves.