Preheat your oven to 170°F. Grease two 9x5-inch loaf pans and set aside.
In a large bowl, combine flour, instant yeast, sugar, and salt. Stir to combine.
Add warm water and oil to the dry ingredients and mix until a soft dough forms.
Knead the dough on a floured surface for 5–6 minutes until smooth.
Divide the dough in half and shape into loaves. Place each loaf into a greased pan.
Turn off the oven and place pans inside to rise for 20–25 minutes or until doubled in size.
Turn the oven back on to 350°F and bake the bread for 25–30 minutes until golden brown.
Remove from pans and let cool on a wire rack before slicing.