I used no oil, Used 1/2 cup apple sauce instead. Added 2 peeled and cored apples diced tiny. Used 1/2c "Luv" all natural sugar replacement and a little "Better Stevia" instead of Truvia. Extra cloves and cinnamon, added pumpkin pie spice, ginger, all spice. Did not do the topping just sprinkled some oatmeal on top.