In a large saucepan, bring water to a boil; add oats and butter. Cook and stir for 1 minute. Remove from the heat; cool to lukewarm. , In a large bowl, dissolve yeast in warm water. Add the oat mixture, sugars, salt and 4 cups flour; beat until smooth. Add enough remaining flour to form a soft dough. , Turn onto a floured surface; knead until smooth and elastic, 6-8 minutes. Place in a greased bowl, turning once to grease top. Cover and let rise in a warm place until doubled, about 1 hour. , Punch dough down; allow to rest for 10 minutes. Shape into 18 balls. Place in two greased 9-in. round baking pans. Cover and let rise until doubled, about 45 minutes. , Preheat oven to 350°; bake rolls until golden brown, 20-25 minutes. Remove from pans to wire racks.