PT Petro Oxo Nusantara holds a religious routine studies after Dhuhr prayers time during the holy month of Ramadan 1445 H. The study is conducted at the Mushola Baitul Ma'mur in the form of a 30-minutes lecture, featuring religious speaker from the Gresik area. This activity begins in the first week of Ramadan until the last week of Ramadan.

It is hoped that through this activity, it can foster the faith of Insan PON and strengthen ties of togethernes during the holy month of Ramadan.