Petrol price down 310 dong a liter today TUOI TRE   The retail petrol price in Vietnam slightly reduces 310 dong a liter today (US$1 = VND21,800), making it a total decrease of 1,200 dong a liter this month after three times of adjustment. Petrolimex and PVOil, the two firms accounting for largest shares in the retail fuel market in Vietnam, announced today that they lower 310 dong per liter of petrol, 100 dong a liter of kerosene and FO oil. This is the third time this month the fuel prices in Vietnam were lowered. In total, the petrol price downs 1,200 a liter, 650 dong a liter of DO oil, and 750 dong a liter for kerosene. So, the petrol price of A92 petrol is now sold at VND23,330 a liter; kerosene VND21,300; DO oil VND21,250; and FO oil VND18,750. Soon earlier, the Ministry of Finance issued an instruction to ask local fuel trading firms in Vietnam to cut the fuel prices no sooner than 4:30pm today. Besides, the ministry also announced that it will increase 2 percent in the import tax of fuel. In details, the import tax for petrol goes up to 16 percent, diesel 12 percent, kerosene and mazut oil with 14 percent.