Oil prices dip as doubt seeps into market on OPEC-Russia output cuts

By Roslan Khasawneh SINGAPORE (Reuters) - Oil prices dipped on Friday on concerns whether major producers would implement an OPEC-Russia deal to reduce production, compounded by data showing output in Russia rose to a post-Soviet high ahead of the announced cutback. The Organization of the Petroleum Exporting Countries (OPEC) and non-OPEC oil production giant Russia this week said they would cut crude output early next year in order to rein in global oversupply that has dogged markets for over t