Use papertowels to pat dry the pork, then sprinkle on all sides with the dry rub seasoning.
Place in a foil-lined ceramic dish. Pour the vinegar all over it, seal with foil and marinate for a few hours.
Bake for 3 hours, then remove from oven, and shred with two forks.
Place the shredded pork on a foil-lined pan. Pour a few spoonfuls of the pork rendering over the pork. Broil for five minutes, or until the pork is slightly crispy along the edges.
Notes
Although there are many pre-made dry rub options, I like to make my own blend. I know not everyone enjoys making things from scratch.
If you're limited on time, or just want to keep it simple, you can purchase dry rub instead.
Store leftovers in an airtight container for 5 days in the refrigerator.