Preheat oven to 350. Grease and flour 2 loaf pans. Combine cake mix, pudding mix, eggs, water and oil in a large bowl. Beat at medium speed with electric mixer for 2 minutes. Pour evenly into pans. 8.5 x 4.5 size loaf pan bake 55 to 60 minutes. 9 x 5 size loaf pan bake 50 to 55 minutes. 25 cm tube or bundt pan bake 50 to 60 minutes. Bake until toothpick inserted in center comes out clean. Cool 15 minutes for loaf pan, 25 minutes for tube or bundt pan. Cool completely before glazing. Glaze if desired.