In a very large bowl, combine the first eight ingredients. In a small bowl, combine oil and salad dressing mix. Pour over cracker mixture; toss to coat evenly.
Transfer to four ungreased 15-in. x 10-in. x 1-in. baking pans. Bake at 250° for 45 minutes, stirring every 15 minutes. Cool completely, stirring several times. Yield: about 8 quarts.