Preheat oven to 250F and line 2 baking sheets with parchment paper.
Mix melted butter, worcetershire sauce and 1 packet of ranch seasoning mix together in a small bowl or pitcher.
In a large mixing bowl combine the rice chex, cheez its, oyster crackers, pretzels and peanuts. Toss to mix.
Pour the butter mixture into the bowl and toss with a flat spatula to coat the ingredients evenly. Open the second ranch seasoning packet and sprinkle into the bowl while tossing the ingredients.
Pour half of the chex mix onto each of the lined baking sheets and spread it out so you have an even layer on each sheet.
Place both baking sheets in the oven at 250F for 1 hour - tossing the ingredients once halfway through
Remove from the oven and cool completely before enjoying.