Combine flour, baking powder, baking soda, and salt. In a large bowl, mix oil, eggs, vanilla, sugar, cinnamon, and nutmeg. Blend in pineapple and zucchini. Stir flour mixture into zucchini mixture. Pour batter into two greased and floured 9 x 5 inch loaf pans. Bake at 350 degrees F (175 degrees C) for 1 hour. Cool on wire racks.