Petróleos Mexicanos’ Olmeca refinery at Dos Bocas, Tabasco, has been out of service since Monday after a power outage, according to people familiar with the operation cited by Reuters. Engineers aim to bring the 340,000-barrel-a-day plant back online on Thursday. The disruption comes as the facility is still ramping up. Pemex data show that Dos Bocas processed 155,000 barrels a day of crude in July, a 9.5% decline from June and well below its nameplate capacity. The plant produced 57,275 barrels a day of gasoline and 76,980 barrels a day of diesel last month. To offset the interruption, Pemex’s Deer Park refinery near Houston is taking additional Maya crude that was originally slated for Dos Bocas. Three Aframax tankers, each capable of carrying about 750,000 barrels, are scheduled to deliver cargoes this week, up from the single shipment previously planned. Built at an estimated cost of about US$20 billion, Dos Bocas is central to President Andrés Manuel López Obrador’s plan to make Mexico self-sufficient in fuels. The latest setback highlights the operational challenges the two-year-old complex still faces as Pemex targets full utilisation by 2027.