I like to inject the butts that I smoke. I usually use, 1 cup chicken broth, 3 T of my rub, stick of real butter, 2 T of lemon juice and a couple pinches of white pepper. I found that if I grind the rub in a spice grinder prior to adding it to the broth, it dissolves better. Heat the mixture on stove to melt butter and mix everything together. Let cool and inject. For me, it isnt a matter of making the butt jucier, but giving it a better flavor that I like more. Havent met a person yet that didnt like it. But I do still smoke them without injecting and still turn out good.