Preheat oven to 250
In a large bowl combine pecans, popcorn, fish crackers, cereal, pretzels and oyster crackers. Combine salad dressing mix and oil in glass measuring cup. Pour dressing over dry ingredients and toss well. Spread mixture on an ungreased baking sheet and bake 30 minutes.
Let cool on pan and stir in raisins. Store in 3-quart airtight container.