1. It is Sunnah for one to oil the hair regularly.
عن أنس بن مالك قال : كان رسول الله صلى الله عليه وسلم يكثر دهن رأسه وتسريح لحيته ، ويكثر القناع حتى كأن ثوبه ثوب زيات (الشمائل للترمذي رقم 33)
Hadhrat Anas (Radhiyallahu Anhu) reports that Rasulullah (Sallallahu Alaihi Wasallam) would regularly oil his mubaarak hair and comb his mubaarak beard, and he would often wear a cloth (beneath his turban when he applied oil to prevent the oil from soiling the turban). (Due to the excessive oil that Rasulullah (Sallallahu Alaihi Wasallam) would apply to his mubaarak head), the cloth beneath his turban resembled the cloth of an oil merchant.