German Style Marinated Pork Chops / Schwenk Steak

4 Pork Shoulder Chops

1/2 cup Vegetable Oil

1 medium Onion sliced thinly

1 tablespoon Onion Powder

1 tablespoon Paprika

1/2  tablespoon Garlic Powder

1/2 teaspoon Salt

1/2 teaspoon freshly ground Pepper