Pineapple Cake

1 box yellow butter cake mix
1 stick butter
1/4 c. Wesson oil
4 eggs
1 can mandarin oranges (juice and all)

Mix well and bake at 350 for 35 minutes.

Topping:

1 large carton Cool Whip
1 pkg. vanilla instant pudding mix (dry)
1 large can crushed pineapple, drained

Mix together and spread on cake.