Question: Is wudu valid if masah is performed on oily hair?
Answer: In the name of Allah, Most Compassionate, Most Merciful,
Assalam’aleykum, I pray this finds you in the best of states.
Jazakum Allah khayr for your question
No oil on a limb or in the hair does not prevent the validity of wudu because it is not a physical barrier between the limb and the water. [Maraqi al-Falah]
And Allah knows best.
May Allah Most High grant you the best of this world and the next. Please keep us in your du’as!
Wassalam
[Ustadh] Sufyan Qufi