I have 4A/4B hair and I use coconut oil after applying my leave-in Shea Moisture Raw Shea Butter Restorative conditioner. It leaves my hair soft and manageable all day.
I use 100% Pure unrefined shea butter as a sealer and to style my twist (great hold and helps define my hair). I co-wash first, rinse, then I use a low poo, rinse, then I apply a rinse out conditioner, cold rinse, then I apply my leave in and curl and style hair milk, lastly I rub a nickel sized amount in my hand and begin twisting my hair.
I also use the Shea butter to unravel my twist. I rub a quarter sized amount on my hands and begin unraveling. I love coconut oil and Shea butter.