I inject with this recipe from the Mod at another site. I also sprinkle some on, along with some rub, when pulling.
Smokin Okie's Pulled Pork Baste & Serving Sauce (Modified}
2 cups apple juice
1/4 cup Worcestershire sauce
1 cup cider vinegar
1 tablespoon dry mustard
2 tablespoon brown sugar
2 bay leaf
4 cloves of garlic
1 teaspoon ground ginger
1 teaspoon cayenne
1/4 teaspoon ground cloves
Heat all of the ingredients in a non reactive pan (the acid in the vinegar will react with some pans be careful) Bring it to a boil, reduce and simmer for 15 min. I make extra and put it in the fridge and it should last for a couple of months. When I put pork in food saver bags, I put some sauce in with it -- when I reheat the pork it tastes just like the first time.