1. Universiti Tunku Abdul Rahman Department of Chemical Engineering Sungai Long Campus Jalan Sungai Long, Bandar Sungai Long Cheras 43000 Kajang, Selangor Malaysia
2. Excelube Marketing Sdn. Bhd. IOI Boulevard, Jalan Kenari 5, Bandar Puchong Jaya 47170 Puchong, Selangor Malaysia