OIL firms are set to implement a big-time rollback on diesel and kerosene prices on Tuesday, September 20, 2022.In their respective advisories, Caltex, Seaoil, Cleanfuel, PetroGazz and Shell said prices of diesel will decrease by P4.15 per liter and kerosene by P4.45 per liter.PetroGazz and Cleanfuel do not carry kerosene.The companies said there will be no movement on the price of gasoline. (SunStar Philippines)