Pour about half bottle of apple cider in a pot big enough to hold your pork shoulder, add about half of the rub to the apple cider and stir it together,add pork shoulder and more apple cider ebough to completly cover the meat and marinate for atleast 24hrs. For the rub mix 5 tbs white sugar,5 tbs light brown sugar,2 tbs kosher salt,2 tbs paprika,1tbs onion powder, 1 tbs garlic powder, 1 tbs fresh ground black pepper. Thrn the remaining rub cover the entire shoulder before going,into the smoker, also add 1 or 2 whole onions to the brine but,use the brine in the water pan