Heat oven to 350°F. Grease bottom only of two 9x5-inch loaf pans or three 8x4-inch loaf pans. In large bowl, combine all-purpose flour, whole wheat flour, sugar, baking soda, salt, cinnamon and nutmeg; mix well.
In medium bowl, combine oil, water, eggs and pumpkin; blend well. Add to flour mixture; beat 1 minute at medium speed. Fold in pecans. Pour batter into greased pans.
Bake at 350°F. for 60 to 70 minutes or until toothpick inserted in center comes out clean. Cool 10 minutes; remove from pans. Cool 1 hour or until completely cooled. Wrap tightly and store in refrigerator.