Preheat oven to lowest setting (190°). In a mixer (I use a bosch), mix together warm water, OJ concentrate, yeast and oil. Add sugar and salt and mix until combined. Add flour a cup or two at a time until dough is combined. Let mixer knead dough for 4-5 minutes. Separate into greased pans (4 large, or 6 small). 

Place in warm oven for 30 minutes or until bread rises. Bump up the temperature on the oven to 350° and let cook for an additional 30 minutes or until golden brown. Remove from oven and use the end of a stick of butter to lightly rub and coat the tops of your bread. This makes it look and taste extra golden and delicious.