Oil prices drop this weekOIL FIRMS will again raise the prices of gasoline, diesel and kerosene this week, the third time fuel rates will move up this month. Gasoline prices will increase by P0.40 per liter (/L), and diesel and kerosene both by P0.65/L. The new prices will take effect at 6 a.m. on Tuesday, April 24. — Denise A. Valdez