In a small bowl combine the brown sugar, garlic, oil, chili powder, paprika, salt and pepper. Rub it all over the roast. Place the roast in a roasting pan, preferably in a wire rack. Add the wine.
Cook uncovered for 5 to 6 hours, until it has a nice crust and the meat is falling apart tender. You are looking for an internal temperature of 185°F, but you can also definitely tell it's done when it is starts to become tender enough to pull it apart with a fork.
Remove the roast from oven and let sit for about 15 to 20 minutes. Use a fork or two to shred the meat into nice sized pieces.
Notes
If you want to rub the meat with the spice rub the night before and leave it loosely covered in the fridge overnight, the dry rub will season the meat a little more deeply. But this isn’t a heavily seasoned roast, so it’s a step that you can skip if you don’t have time or fridge space.You are looking for an internal temperature of 185°F, but you can also definitely tell it’s done when it is starts to become tender enough to pull it apart with a fork.