In a large bowl or the bowl of a stand mixer, dissolve the yeast in warm water with a pinch of sugar. When the yeast is bubbly and foamy, add the sugar, salt, oil, and 4 cups flour, and mix until smooth.
Add remaining flour, ½ cup at a time, to form a soft, smooth dough. The dough should stick just slightly to your finger when touched, but not be overly sticky. Knead for 5-7 minutes, until smooth, then roll into a ball.
When the dough has risen, punch it down gently and divide it in half. Roll each half of the dough into a long rectangle about 8 inches wide.
Place the dough, seam side down, into lightly greased bread pans, and cover with plastic wrap. Let rise for one hour, or until the dough is ½ – 1 inch higher than the top of the pan.