MANILA: Oil firms announced mixed price adjustments starting Tuesday morning.In separate advisories, Caltex, Cleanfuel, Petro Gazz, Seaoil, and Shell said they would increase gasoline prices by 10 centavos per liter while decreasing diesel prices by 40 centavos per liter.Caltex, Seaoil, and Shell will also slash kerosene prices by 70 centavos per liter.Last week, oil companies implemented price rollback of as much as PHP1.15 per liter for kerosene products.Department of Energy data showed that since the start of the year, gasoline prices had a net increase of PHP10.25 per liter for gasoline, PHP8.15 per liter for diesel, and PHP1.20 per liter for kerosene.Source: Philippines News Agency