Heat water in a pot over moderate heat on the stove, then stir in the sugar once it reaches a boil and let it dissolve.
Remove the pot from the heat and mix in the yeast, allowing it to sit for 10 minutes until activated.
Stir in the oil and salt, then gradually add the flour, one cup at a time, beating well after each addition.
Stop adding flour once the dough clumps together but remains slightly sticky.
Flour a work surface, transfer the dough onto it, and knead for about five minutes, sprinkled with flour as needed to prevent sticking.
Lightly grease a bowl, place the dough inside, cover with a clean cloth, and let it rise in a warm place for an hour.
Punch down the dough, divide it into two equal halves, and place each into a greased loaf pan.
Cover again and let it rise for another 30 minutes.
Meanwhile, preheat the oven to 350°F and bake for about 30 minutes or until golden brown and cooked through.