london nov 19 reuters  sales of west african crude were steady on friday as china showed it still had a buying appetite and differentials were also held  nigerian official selling prices osps for december and initial export plans for january are expected imminently  chinas unipec purchased a cargo of angolan hungo in a sign chinese buying had not yet abated for the month  no januaryloading angolan crude cargoes were yet being offered with a couple still for sale from the december programme  brents premium to dubai quotes has cooled from eightyear highs hit earlier this month making crude from the atlantic basin more affordable to asian buyers again  a possible coordinated release of oil stocks from consuming countries would likely mark a peak for asias spot crude market after it touched near twoyear highs this week however read more  thailands ptt and taiwans cpc spurned west african grades for mideast oil in their latest tender awards  indian refiner mrpl closed a buy tender for a cargo of januaryloading crude with results due to be known at the beginning of next week  the biden administrations push for a coordinated release of oil stockpiles serves as a warning to the opec production group that it should pump more oil to address concerns of high fuel prices in powerhouse economies like the united states china and others  chinas diesel exports fell in october after a rebound the previous month as refiners diverted more supplies to the domestic market to make up for a supply squeeze following months of production curbs