Mine simply feels much better when I oil than when I don't. Due to some medication I was on about a year ago, much of my length is brittle and dry. I know I should probably cut some of it off, but I can't bear to lose that much length, so I oil. Because my hair is super fine I have to CO every other day, so I do a heavy, heavy oiling the night before each of my washes, plus light oilings in between. This has kept the length manageable, reasonably healthy looking and will hopefully let me reach my goal of waist length sooner rather than later!!