By Kris Crismundo  Philippine News Agency MANILA – Oil companies will implement price adjustments on petroleum products starting Tuesday. In separate advisories, Caltex, Cleanfuel, Jetti, Petro Gazz, Phoenix, Seaoil, Shell, and Unioil said they will increase gasoline prices by PHP1.40 per liter and will decrease diesel prices by PHP0.50 per liter. Caltex, Seaoil, and Shell will also slash kerosene prices by PHP0.35 per liter. Other oil firms are expected to follow suit. Since the start […]