Pig Pickin' Cake
["1 box Duncan Hines lemon cake mix", "1/2 c. Wesson oil", "4 eggs", "1 (8 oz.) can Mandarin oranges and juice", "Frosting:", "1 (20 oz.) can crushed pineapple", "1 box lemon instant pudding (3 3/4 oz.)", "1 (12 oz.) Cool Whip"]
["Beat thoroughly together (makes 4 layers).", "Bake at 350\u00b0 until done.", "Cool completely."]
["lemon cake mix", "Wesson oil", "eggs", "oranges", "Frosting", "pineapple", "lemon instant pudding"]