CNBC | Non-Opec countries agree to cut oil output BBC News Eleven oil-producing countries, who are not members of the Opec oil cartel, have agreed to cut their output to boost prices. The group of states, which includes Russia, said on Saturday that they will cut supplies by 558,000 barrels per day. Opec ... Non-OPEC oil producers to cut output 558000 barrels a day Russia and Others Join OPEC in Rare, Coordinated Push to Cut Oil Output Stormy Seas Ahead For Oil Markets |