Exxon and Chevron Push Gulf Coast Refineries Near Capacity as Fuel Stocks Tighten
US refinery utilization above 95% has driven record fuel-making profits but leaves little buffer before September maintenance season pulls throughput back.
Bloomberg data show ExxonMobil's Gulf Coast refineries ran at a 95% utilization rate and Chevron's at 97% through the second quarter of 2026, with Shell reported above 100% over the same period. Oilprice.com reported on Monday (2026-08-03) that Big Oil is warning global fuel stocks are running dangerously low — a problem made more acute by the proximity of September, when maintenance season typically begins and refinery throughput is dialed back.5
Running near capacity has delivered extraordinary margins. Chevron's US fuel-making profit surged to $2.4 billion in the second quarter, more than ten times the prior quarter's return, Rigzone reported. The company posted record overall second-quarter results on Friday (2026-07-31), with adjusted earnings of $6.06 a share — 41 cents above the average of analyst estimates compiled by Bloomberg.3,4
ExxonMobil's refining division also reached a four-year high, at $4.1 billion. But that figure fell well short of the $5.37 billion analysts had penciled in, a miss that complicates the narrative of two supermajors running their plants hard and collecting uniform windfalls.4
The structural context is a shrinking US refining system. EIA data show operable atmospheric distillation capacity totaled 18.2 million barrels per calendar day as of January 1, 2026 — down more than 250,000 barrels per day from a year earlier, a drop of roughly 1%. Fewer refineries handling similar throughput push utilization rates higher even before war-driven supply disruptions add further pressure.2
Diesel prices show how tight the fuel supply picture has become. Retail diesel is up more than 40% from pre-war levels, Rigzone reported. ICE Brent crude front-month was trading at $84.14 a barrel early on Tuesday (2026-08-04), with RBOB Gasoline at $2.97 a gallon and Heating Oil at $3.88 a gallon on the same date.4
Chevron deployed its windfall into balance sheet repair. The company cut debt by a record $8.4 billion, which it described in its Friday (2026-07-31) statement as "reinforcing the company's ability to fund the long-term investment needed to deliver reliable energy for decades to come." CFO Eimear Bonner said Chevron also retained more cash on the balance sheet "given the volatile times that we're operating in." Production climbed 20% to the equivalent of 4.07 million barrels a day in the quarter.3,4
Despite the record earnings, Chevron's equity tells a more measured story. Shares are up 23% in 2026, but most of those gains came in the first six weeks of the year. Since the start of the US-Iran war, the stock has advanced only about 3%, suggesting markets have already priced much of the refining upside. Shares rose about 0.8% in pre-market trading following the Friday (2026-07-31) results.3
The next stress point is September. Oilprice.com reported on Monday (2026-08-03) that refiners have in past cycles postponed maintenance to capture periods of stronger demand, but with inventories already stretched, that calculation is harder to justify. Plants operating at 95% to above 100% for an extended period accumulate mechanical risk. Any unplanned outage in that environment would hit a market with limited spare processing capacity available to cover it.5
Chevron's January 2026 statement outlined a pathway to grow Venezuelan production by 50% over 18 to 24 months. OPEC data show Venezuela lifted 1.179 million barrels a day in May 2026, up 3.8% from April 2026 and 10.6% higher than a year earlier. More feedstock over that horizon could ease some pressure on Gulf Coast throughput. But it arrives well after September, and the more immediate signal for fuel markets is when the major operators schedule their turnarounds — and how much they actually cut back when they do.1,5