Oil prices inched higher on Friday, and were on track for a fifth consecutive weekly gain, on expectations that demand growth would outstrip supply and OPEC+ producers would be cautious in returning more output to the market from August. Brent was up 4 cents, or 0.1%, at $75.60 a barrel at 0854 GMT, heading for a 2.8% jump for the week, Reuters reported. US West Texas Intermediate (WTI) crude was up 1 cent, or less than 0.1%, at $73.31 a barrel, and headed for a 2.4% weekly gain, it said. Both benchmark contracts settled at their highest levels since October 2018 on Thursday. "Oil prices have been supported in recent weeks, benefiting from the ongoing decline in global oil inventories as oil demand continues to grind higher, although unevenly," said UBS analyst Giovanni Staunovo. "With larger oil inventory declines ahead, we expect oil prices to keep moving higher during 3Q21," he added, referring to the third quarter of this year. Oil also got some support on Friday as the approval of a US infrastructure bill boosted optimism over the energy demand outlook, analysts said. All eyes are on the Organization of the Petroleum Exporting Countries, Russia and allies - together called OPEC+ - who are due to meet on July 1 to discuss further easing of their output cuts from August. "The producer group has ample space to boost supply without derailing the drawdown in oil stocks, given the rosier demand outlook," said Stephen Brennock of oil broker PVM. On the demand side, the key factors OPEC+ will have to consider are strong growth in the United States, Europe and China, bolstered by vaccine rollouts and economies reopening, according to analysts who said this was countered by rising COVID-19 cases and outbreaks in other places. The prospect of sanctions on Iran being lifted and more of its oil hitting the market anytime soon has dimmed, with a US official saying "serious differences" remain over a range of issues over Tehrans compliance with the 2015 nuclear deal.