GASOLINE prices went up slightly on Tuesday, Dec. 16, while diesel and kerosene prices were rolled back. The per liter price of gasoline rose by 20 centavos. Diesel and kerosene were both down by 20 centavos. Local oil industry sources attributed the price adjustments to possible prospects for a Russia-Ukraine peace deal, and the return of some oil supply to the market. Last week, gasoline went up by P1.20 per liter. There were no price adjustments for diesel and kerosene. Since January, the price of gasoline has risen by P21.30 per liter, diesel by P21.35 per liter, and kerosene by P7.45 per liter.