Well according to wowhead, the actual recipe to make shadow oil was removed in 4.1 and it was given to trainers to teach at 165. However they do not seem on Monster to teach this item at any level. How do I learn this recipe?
Still unsolved, i was looking for it for over 3 hours now and still nothing. Please fix this, either add it to the trainer to learn or bring the actual recepie and npc who sells it. things like that make me more and more annoyed about the server.