In a large mixing bowl, combine the flour and salt. Add the warm water and oil, then stir until the mixture starts to come together. Knead the dough on a lightly floured surface for about 5 minutes until smooth and elastic. Divide the dough into 8 equal portions, roll each into a ball, and let them rest covered for 15 minutes. On a lightly floured surface, roll each ball into a thin circle about 8 inches in diameter. Heat a dry skillet or skillet over medium-high heat. Cook each tortilla for about 1 minute on each side, or until lightly browned and puffy. Keep cooked tortillas warm wrapped in a clean towel.