There are lighter oils that aren't difficult to remove. The CG book recommends lavendar oil. My personal fav is jojoba. Jojoba is like the natural oils your skin and scalp produce. I'll add a drop to my gel, or rub a couple of drops between my palms and smooth lightly over my crown. I've never had any trouble getting it out, even when I was strictly CG.
Couple of inches past shoulder length 3A. Shampoo every 3rd or 4th day w/ baby shampoo; Tigi Fashionista conditioner; back to Condition 3-in-1 mousse . Alternate days water rinse, conditioner and mousse.