Preheat oven to 350^. Grease and lightly flour one bundt pan.

In a mixing bowl; beat oil and eggs until creamy. Add sugars and vanilla to bowl, beat well.

Combine the flours, baking powder, cinnamon and salt in a bowl. Slowly add flour mixture to wet mixture. Mix until combined. Batter will be very thick. Fold in diced apples with a strong wooden spoon. Spread batter into prepared pan.

Bake at 350^ for 50-65 minutes or until toothpick inserted in center comes out clean. Cool cake in pan on wire rack for 10 minutes. Once cool loosen cake around edges of pan with knife. Invert cake onto rack and finish cooling. Once cake is completely cool, transfer to serving plate. Serve with whipped topping.