Shaykh Abdul Azeez ibn Baaz rahimahullaah in his Majmoo` Fataawaa vol. 12 pg. 414-415:
Q: Is reading Sooratul Kahf on Friday & the night of Friday a recommended act?
A: There are narrations that support each other in that regard – attributed to the Prophet sallAllaahu `alaihi wa sallam – indicating the legitimacy of reading Sooratul Kahf on Friday.
And that has been authentically reported from Abu Sa`eed al-Khudree radiyallAllaahu `anhu as an action of his; and the like of this would not have been done based on opinion, rather it indicates he had something from the Prophet sallAllaahu `alaihi wa sallam in that regard.