Percentage Analysis Mixed of CPO, Phosphic Acid and Sodium Hydroxide as a Replacement for Diesel Engine Oil Fuel Using a Calorize Test. int. jour. eng. com. sci [Internet]. 2020 Sep. 21 [cited 2025 Dec. 5];9(09):25189-98. Available from: http://www.ijecs.in/index.php/ijecs/article/view/4529