Oil traded at a 16-month high as OPEC prepared to meet non-members in an effort to secure additional output cuts following last week’s surprise deal to curtail supply. Futures rose as much as 0.7 percent in New York after advancing 14 percent the previous three sessions. Organization of Petroleum Exporting Countries’ members will meet producers from outside the group in Vienna on Saturday to discuss the supply curbs, according to people familiar with the situation. In the U.S., drillers added rigs for a fifth week to reach the highest level since January, data from Baker Hughes Inc. showed. Oil has climbed above $52 a barrel after OPEC agreed Wednesday to reduce output by 1.2 million barrels a day by January, while non-member Russia pledged a cut of as much as 300,000 barrels a day. Attention is now shifting to OPEC’s compliance and efforts to persuade other producers to cooperate. […]