Rinse and dry your pork shoulder or butt very thoroughly. Set it aside in a large bowl or a baking sheet while you prepare your dry rub.

In a medium bowl, combine all of your seasonings including the: brown sugar, seasoned salt, paprika, garlic powder, black pepper, onion powder, and cayenne pepper.

Use a spoon to stir all of the seasonings until they are fully combined. 

Gently drizzle the olive oil all over your pork roast and rub it in until all sides are coated. 

Now begin to sprinkle your dry rub mixture all over the pork butt, ensuring that you coat every single side. 

Use your hands to firmly pat the seasoning into the pork. 

Pour the apple juice (or water) into the bottom of your slow cooker, then add in the seasoned pork.

Cover the slow cooker and cook on high for 4 hours, or low for 8 hours. 

Pork will be super tender, and you can shred it with a fork, or chop it up with a sharp knife. And enjoy!