UPDATE 1-Poland's PKN says quality of Russian oil generally deteriorating  Reuters(Adds details, quotes). WARSAW, July 19 (Reuters) - The quality of Russian crude oil, which was hit by a contamination crisis earlier this year, is deteriorating in …

Polish refiner PKN assesses potential losses from tainted Russian oil  Reuters Africa(Adds more detail, company comment). WARSAW, June 11 (Reuters) - Oil refiner PKN Orlen said on Tuesday it was conducting an analysis to estimate the costs ... Re …

UPDATE 1-Refineries must agree division of tainted oil to clear...  Reuters Africa(Adds quotes, details). WARSAW, May 20 (Reuters) - Poland cannot get clean oil from Russia until refineries have agreed how to divide the contaminated oil still ... …