Oil slipped a fourth day, heading for the longest run of declines in six weeks, as OPEC ministers gather in Vienna ahead of a meeting on Thursday to discuss production policy. Futures fell as much as 0.7 percent in New York, after declining 0.9 percent the previous three sessions. Canadian oil-sand producers, including Suncor Energy Inc., started to resume operations on Tuesday after wildfire threats eased, while supply disruptions continued to reduce output in Nigerian and Libya. The global oversupply that has caused prices to slump since 2014 is correcting itself, the oil minister of the United Arab Emirates said Tuesday in Vienna. Oil has surged about 85 percent since touching a 12-year low in February on signs the global surplus is easing amid declining output. The Organization of Petroleum Exporting Countries is unlikely to reach an agreement limiting production this week as the group sticks with Saudi Arabia’s […]