Preheat oven to 250 degrees.
Mix the canola oil with salt, ranch dry mix, white pepper, and fajita seasoning.
In a large bowl, combine Wheat Thins, nuts, pretzels, and cheese crackers. Stir to combine.
Add the oil and seasoning mixture to the bowl and stir until well coated.
Spread the mixture onto a baking dish or baking sheet. Bake in the oven for 30-40 minutes, turning the snack mix every 10 minutes.