The time it takes to see results with hair oil varies from person to person and depends on various factors, including your hair's current condition and the specific oil used. In some cases, you may notice immediate benefits such as smoother, shinier hair. However, when it comes to significant improvements in hair growth and thickness, it typically takes patience and consistent use over several weeks to months. Most experts recommend regularly oiling your hair at least once a week for a few months to see noticeable changes, but individual results can vary. It's essential to remember that hair growth is a gradual process, and while hair oiling can promote a healthier scalp and hair, it may not yield instant or miraculous results.