Pre-heat oven to 250ºF.
In a large bowl, pour in oyster crackers and Cheez-its.
In a separate small bowl, whisk together ranch mix, oil and buffalo sauce.
Pour over crackers; toss well to coat.
Pour crackers on a large baking sheet.
Bake for 20 minutes; tossing half way through baking.
Remove from oven, allow to completely cool and store in an airtight container.