In the bowl of a stand mixer fitted with the paddle attachment, add 2 cups flour, 2 cups of oats, honey, oil, warm water, and salt. Mix on low until combined, about 2 minutes.
Once the mixture has cooled to about 110°F, add yeast and mix ion low until the yeast is just combined.
Remove the bowl from the stand mixer and cover with a towel. Rest for 10 minutes, allowing the yeast to bloom. The mixture will look foamy and will still be fairly wet.
Add the bowl back to the stand mixer, now fitted with the dough hook. With the mixer on low, add the remaining flour, one cup at a time, until you have a smooth, soft dough (5-7 minutes).
Continue to knead the mixture with the dough hook for 5 more minutes.
Transfer the dough to a separate large greased bowl. Cover with a towel and place in a warm dark area for 1 hour or until doubled.