Arlington Inn Steak Kebob Marinade

           14 ounces ketchup
           1 cup oil
           1 cup white vinegar
           1 ounce Worcestershire sauce
           2 tablespoons garlic Powder
           1 tablespoon onion salt
           1 tablespoon ground black powder

           Whisk together all the ingredients.
           Marinate 24 - 48 hours.
           Grill to desired doneness.