Dos Bocas Ramps Up: Olmeca Refinery Lifts 2025 Gasoline Output 109%

Pemex closed out 2025 claiming the number the Olmeca refinery was supposed to deliver years ago. In its year-end accounting, the state oil company reported average gasoline output of 346,000 barrels per day for 2025, a 109% jump over the roughly 165,000 barrels a day it was making in December 2018. Diesel rose 131% to 230,000 barrels a day. Jet fuel climbed 38% to 44,000. The company credits one plant above all others for turning the corner: the Olmeca refinery at Dos Bocas, in Paraiso, Tabasco.

Read the percentage carefully. This is not a tidy one-year comparison. Pemex benchmarks against December 2018, the first month of Andres Manuel Lopez Obrador's presidency, because that is the political story the refining push was built to tell. The underlying operational fact still holds: Mexico is refining far more of its own crude into finished fuel than it was a year ago, and Olmeca is the reason the line finally bent up.

What Olmeca actually did in 2025

The Dos Bocas plant spent most of 2025 climbing a steep, uneven curve. It processed about 7,000 barrels a day in February. By December it hit roughly 245,000 barrels a day, near three-quarters of its 340,000-barrel nameplate capacity. Averaged across the full year, Olmeca contributed around 139,000 barrels a day of crude processed. For a refinery that critics spent five years calling a monument to overspending and slipped deadlines, that is a real production line, not a ribbon-cutting.

The ramp was not smooth. Output sagged below 50,000 barrels a day at one point over the summer before recovering hard into the fourth quarter. That volatility matters. A refinery that swings from 50,000 to 245,000 barrels a day inside a few months is still shaking out its process units, and sustained runs near capacity are the test Olmeca has yet to pass over a full year.

The whole system ran harder, not just Dos Bocas

Olmeca is the headline, but it did not carry the load alone. Mexico's National Refining System, the six older plants plus Olmeca, processed an average of 1.03 million barrels of crude a day across 2025. Pemex frames that as 102% above the December 2018 baseline of about 511,000 barrels a day. Independent tracking backs the direction of travel: Mexico's seven refineries hit their highest combined run rates in a decade during 2025, with December throughput around 1.22 million barrels a day, the strongest month since 2014.

That is the more durable story. For most of the past fifteen years, Pemex refineries ran below half their capacity, leaking money and leaning on imported gasoline from the U.S. Gulf Coast to keep Mexican pumps full. Getting the fleet above a million barrels a day, and keeping it there, is the shift that actually changes the country's fuel math.

U.S. exporters are the ones losing volume

The clearest evidence that something changed is on the other side of the border. U.S. fuel exports to Mexico fell to their lowest level in sixteen years in 2025. Mexico has been the single largest buyer of American gasoline and diesel for years, so every barrel Olmeca and its sister plants produce is a barrel Gulf Coast refiners do not sell south.

The pressure runs in both directions. Mexican crude exports to the U.S. have collapsed as Pemex keeps more oil at home to feed its own refineries. Total crude exports dropped from about 1.1 million barrels a day in 2020 to roughly 503,000 in December 2025, with Maya heavy shipments down sharply. That squeezes American refiners built to run heavy sour barrels. As consultant John Padilla put it, U.S. refiners need heavy crude and are rapidly losing both Mexican and Canadian supply.

The self-sufficiency target is close, but not banked

Pemex has said it wants the refining system producing an average of 1.5 million barrels a day of finished products, gasoline, diesel and jet fuel combined, to stop importing altogether. Earlier company projections pointed to near self-sufficiency in gasoline by 2026 and a genuine surplus by 2027. The 2025 figures put that goal within sight rather than in hand.

Getting there depends on Olmeca holding its December pace for twelve straight months, not four, and on the coker units at Tula and Salina Cruz coming fully online to squeeze more light product out of Mexico's heavy crude. Those are the pieces that convert a strong quarter into a structural change.

What to watch in 2026

Three things will tell you whether 2025 was an inflection point or a good year. First, Olmeca's utilization rate: can it average above 70% of capacity across all of 2026, or does it slide back toward the sub-50,000-barrel troughs it hit last summer. Second, the import line: U.S. Energy Information Administration data on gasoline and diesel flows to Mexico will show, month by month, whether the decline holds. Third, the money. High run rates are worth little if Pemex is refining at a loss on a balance sheet already carrying more than $100 billion in debt.

For now, the operational verdict is straightforward. The refinery that spent years as a punchline produced fuel at meaningful scale in 2025, the national system ran harder than it has since 2015, and American exporters booked their weakest year selling fuel to Mexico since 2009. The 109% is measured against a carefully chosen starting point. The barrels are not.