How much hair oil should I actually use?

Across the reviewers we read, the near-universal consensus is 2-3 drops, applied to mid-lengths and ends rather than the scalp. Multiple r/finehair and r/HaircareScience commenters note that most negative 'greasy/heavy' reviews are user-error from over-application. Start with one drop, warm it between palms, and add more only if needed.