Oak is the # 1 wood used in most BBQ joints.I usually use black and white oak as my mix wood with fruit wood. I'll use 1 piece of oak to every 3 pieces of fruit wood. In Eastern NC I know of a of resturant that uses strictly oak logs for cooking butts overnight producing a wonderful Eastern NC Q. Not sure which oak because there is a wide variety of oaks in the state.
It is a type of Red Oak. Black Jack is just the name. All oaks are either White or Red.I use a lot of red oak. I'm not familiar with black oak.