Oil prices rose marginally in Asian trade on Friday but were on track for a third straight week of decline, hurt by U.S. President Donald Trump's renewed trade war on China and threats of tariff hikes on other countries.

China’s state-run refiners are expected to resell US oil cargoes and seek alternative supplies in the aftermath of Beijing’s response to Washington tariffs, a move that is already pushing up the cost of some replacement grades.

Oil headed for a third weekly decline as President Donald Trump’s tariffs on China and his push for increased domestic production weighed on the demand outlook. West Texas Intermediate was steady near $71 a barrel,

Oil prices edged up on Thursday after Saudi Arabia's state oil company raised its March crude prices sharply, but the gains barely dented the previous day's slide in benchmark Brent crude. Brent crude futures rose 44 cents,