LONDON—Oil slipped on Tuesday, staying close to a seven-year high, weighed by speculation OPEC+ could go further than expected to add supply at a meeting this week and expectations of a rise in U.S. inventories. While the Organization of the Petroleum Exporting Countries and allies, known as OPEC+, has been expected to maintain its policy of gradual production hikes at a meeting on Wednesday, Goldman Sachs said there was a chance of further steps. “We view growing potential for a faster ramp-up at this meeting, given the pace of the recent rally and the likely pressure from importing nations,” the bank said in a Jan. 31 report, adding the outcome remained “evenly balanced” between an accelerated response and a status quo increase. Brent crude was down 74 cents, or 0.8 percent, at $88.52 a barrel at 1030 GMT. U.S. West Texas Intermediate crude slipped 83 cents, or 0.9 percent, to …