Refinery closures and increased export opportunities in the US Gulf coast (USGC) will likely do little to alleviate an oversupply of regional gasoline in early 2025 as refining capacity in Mexico expands.
LyondellBasell's 264,000 b/d Houston refinery tentatively plans to shut down during the first quarter of 2025 after previously delaying an end to production from the final quarter of 2023. Though some refiners welcome refinery shutdowns to provide a lift to falling margins, market participants have suggested that the upcoming closures will not considerably reduce the oversupply of product in the region. The Gulf coast's weekly average output totaled 2.2mn b/d in 2024, over one-fifth of the US's 9.7mn b/d weekly average. LyondellBasell's Houston refinery closure could cause total weekly production in the region to contract by as much as 12pc if it goes as planned.
Product supplied, a proxy used by the US Energy Information Administration (EIA) for finished motor gasoline demand nationwide, has not recovered to pre-pandemic levels. Demand had fallen to fresh lows of 8.15mn b/d in 2020, when Covid-19 pandemic restrictions limited travel, but marginally regained strength after those measures were lifted. In the five years prior to the pandemic, gasoline product supplied ranged between a yearly average of 8.86mn-9.34mn b/d. In 2024, it averaged 8.85mn b/d, just below the pre-pandemic five-year average, but has grown for a second consecutive year after hitting a record low of 8.1mn b/d for 2022.
In its energy outlook for 2025, the Louisiana State University's (LSU) Center for Energy Studies said it expected domestic demand to remain relatively flat, but that increased US net exports could shave off excess supply.
Gulf coast gasoline stockpiles have exhibited steady growth since 2022, largely outpacing demand for the product, EIA data indicates. In the five years prior to the Covid-19 pandemic, weekly inventory averages ranged between 75mn-83mn bl. After hitting a record weekly average of 86.9mn bl in 2020, stockpiles have hovered above the pre-pandemic range for every year since, with 2024 weekly average inventory levels totaling 83.1mn bl.
Gasoline prices peaked in 2022 due to rebounding gasoline demand since the pandemic. Though prices remain above the $2/USG mark since 2020, cash prices for 87 conventional finished gasoline in 2024 averaged 68¢/USG lower than in 2022 and 23¢/USG less than 2023's average, further depressing refining margins from a year earlier.
Exports: a closing door
Both exports to Latin America and domestic shipments to the US east coast have historically absorbed excess supplies of Gulf coast gasoline, but increased refining capacity and a potential trade war between the US and Mexico could choke off exports to Latin America.
Market participants point to exports as a favorable outlet for excess gasoline supply with export data showing a strong correlation with the stock build in the Gulf coast since 2022.
The US Gulf coast exported an average of 251,000 b/d in 2024 after four consecutive years of gains, according to trade analytics firm Kpler. Export levels out of the region are more than double the pre-pandemic four-year average of 121,750 b/d.
However, Pemex's 400,000 b/d Dos Bocas refinery in Mexico is projected to come on line in late 2025 and will likely reduce the Gulf coast's share of the gasoline export market. Mexico imports nearly 90pc of its gasoline from the US, while roughly 82pc of Gulf coast exports land in Mexico, according to separate Kpler data. Mexican president Claudia Sheinbaum has continued expanding Mexico's energy independence, with 2024 marking the closest in nine years that gasoline production has approached import levels.
Furthermore, US president-elect Donald Trump's potential 25pc tariff on imports from Canada and Mexico, including oil and gas, could spark retaliatory tariffs from Mexico, previously threatened by Sheinbaum. Should Trump go through with the tariffs when he takes office on 20 January, the tariffs between both countries would cut off gasoline exports and leave stockpile levels in the Gulf coast significantly higher.
