Preheat your oven to 250°F (120°C).
In a large mixing bowl, combine the pretzel twists and vegetable oil. Toss until the pretzels are evenly coated.
In a separate small bowl, mix together the ranch dressing mix, garlic powder, onion powder, dill weed, and black pepper.
Sprinkle the seasoning mixture over the pretzels and toss again until all pretzels are well coated.
Spread the seasoned pretzels in a single layer on a baking sheet.
Bake in the preheated oven for 30 minutes, stirring every 10 minutes to ensure even coating and crispiness.
Remove from the oven and let cool completely before serving.