What's Happening
Goldman Sachs has dramatically revised its diesel refining margin forecast upward, projecting crack spreads — the profit refiners earn converting crude oil into diesel fuel — will reach $63 per barrel, effectively doubling the investment bank's earlier profit estimate for the global refining sector. The revision, reported by OilPrice.com on August 31, 2026, signals that Wall Street's most closely watched energy desk now sees the global diesel shortage as more severe and more durable than previously modeled.
Diesel crack spreads are a critical leading indicator for what truckers, farmers, construction companies, and ultimately consumers pay at the pump. When refiners earn $63 per barrel processing crude into diesel — compared to the more typical $20–$35 range seen during balanced market conditions — it reflects a fundamental mismatch between global diesel supply and demand that cannot be resolved quickly. Refinery capacity cannot be switched on overnight, and crude oil feedstocks must be specifically suited to high-distillate-yield refining.
The Goldman revision represents one of the most bullish calls on diesel margins seen from a major investment bank in recent years. The bank's commodity research desk, led by analysts who track global refinery throughput, inventory levels, and trade flows, cited the persistent structural deficit in middle distillate supply as the primary driver. Middle distillates — the category that includes diesel, heating oil, and jet fuel — have been under supply pressure globally as post-pandemic industrial demand recovery outpaced refinery capacity additions.
For US drivers and fleet operators checking gas prices today, this Goldman forecast is not an abstraction. Diesel prices at the pump are directly tied to refining margins. When crack spreads expand sharply, retail diesel prices follow within days to weeks, as refiners and fuel distributors reprice wholesale contracts to capture the margin windfall — and those costs flow downstream to every diesel-powered vehicle on American roads.
Data Snapshot
Goldman Sachs's revised diesel crack spread forecast of $63 per barrel compares starkly to historical norms. According to EIA data, US diesel retail prices have tracked closely with refining margin movements throughout 2025 and 2026. The EIA's weekly retail on-highway diesel price — a benchmark tracked every Monday — has been elevated throughout the summer of 2026, with the national average price per gallon for diesel running well above the five-year seasonal average.
AAA reports that diesel prices nationally have remained a significant premium over regular unleaded gasoline, a spread that widens further when refining margins surge as Goldman now projects. EIA weekly petroleum inventory data has shown middle distillate stocks — which include diesel and heating oil — running below the five-year average range, a structural deficit that directly supports Goldman's bullish margin call. Each week that distillate inventories fail to rebuild toward seasonal norms adds credibility to the $63-per-barrel crack spread projection. WTI crude oil spot prices, tracked daily by the EIA, remain a key input: higher crude costs combined with surging crack spreads create a compounding effect on retail diesel prices per gallon.
Why It Matters at the Pump
The translation from a $63-per-barrel refining margin to what drivers see at the diesel pump is direct and measurable. As a rule of thumb, every $10-per-barrel move in crack spreads translates to roughly 24 cents per gallon at the retail level, once distribution margins and taxes are layered in. A move from a normalized $25 crack spread to Goldman's projected $63 — a $38-per-barrel swing — implies upward pressure of nearly 90 cents per gallon on diesel retail prices, all else being equal.
The national average gas price for diesel has already been elevated in 2026. If Goldman's forecast materializes fully, on-highway diesel could approach or exceed price levels not seen since the acute supply crisis periods of recent years, placing enormous pressure on trucking companies, agricultural operators running irrigation and harvest equipment, and construction fleets.
Regionally, the impact will not be uniform. California diesel prices, already the highest in the continental US due to the state's unique fuel blend requirements, carbon pricing programs, and limited pipeline connectivity, will likely see the most severe absolute price levels. The West Coast broadly — Oregon, Washington, Nevada — tends to move in lockstep with California refinery economics. The Midwest, which benefits from proximity to major pipeline infrastructure and refinery clusters in Illinois, Indiana, and Ohio, typically absorbs margin shocks more gradually. The Gulf Coast, home to the highest concentration of US refining capacity, often sees the smallest retail premium above wholesale — but even Gulf Coast diesel prices will rise if crack spreads hold at $63. The Northeast, dependent on waterborne diesel imports and home heating oil demand that competes with on-road diesel for the same refinery output, faces particular vulnerability heading into fall 2026.
What's Driving This
The Goldman Sachs forecast revision reflects several converging structural forces, not a single event. First, global refinery capacity has not kept pace with the post-pandemic recovery in industrial diesel demand. Major refinery closures in Europe — particularly in Germany, Italy, and the UK — reduced the Atlantic Basin's ability to produce middle distillates, and those closures have not been replaced with equivalent new capacity.
Second, OPEC+ production management has kept crude oil supply constrained, which limits the feedstock available to refiners globally. When crude supply is tight, refiners compete more aggressively for available barrels, and those with the best crude-to-diesel yield configurations — complex refineries capable of processing heavier sour crudes into high-distillate-yield output — command premium margins.
Third, sanctions on Russian petroleum products, which took effect in stages beginning in 2022 and 2023, permanently redirected global diesel trade flows. Russia had been a major supplier of diesel to European markets. The rerouting of Russian diesel to Asia and the Middle East, combined with European buyers sourcing replacement barrels from the US Gulf Coast, India, and the Middle East, added logistical costs and tightened the effective global supply available to price-sensitive buyers.
Fourth, seasonal demand is a factor: as the Northern Hemisphere moves into fall 2026, heating oil demand — which draws on the same refinery distillate pool as diesel — will begin to compete more directly with on-road diesel demand, tightening the supply picture further and supporting Goldman's elevated margin forecast through at least Q4 2026.
Historical Context
To understand how extraordinary a $63-per-barrel diesel crack spread is, consider the historical range. During the decade from 2010 to 2019, US diesel crack spreads averaged roughly $20–$28 per barrel, with occasional spikes during refinery outages or severe winter demand events. The COVID-19 pandemic initially crushed crack spreads to near zero in spring 2020 as demand collapsed.
The most dramatic recent precedent came in spring and summer 2022, when the combination of post-pandemic demand recovery, the Russian invasion of Ukraine, and critically low distillate inventories drove diesel crack spreads above $60 per barrel — briefly touching levels near $70 in some markets. That episode sent US retail diesel prices to record highs above $5.75 per gallon nationally, with California diesel exceeding $6.50 per gallon.
Goldman's current $63 forecast suggests the market is approaching — or has already reached — conditions comparable to that 2022 crisis period. The key difference in 2026 is that the shortage appears more structural than episodic: refinery capacity has not been meaningfully added in the US or Europe since 2022, and the geopolitical factors that disrupted Russian diesel flows remain in place. This is not a temporary spike driven by a single weather event or refinery outage — it reflects a sustained supply-demand imbalance that Goldman's analysts believe will persist.
Regional Breakdown
California will bear the sharpest price impact from surging diesel crack spreads. The state's Low Carbon Fuel Standard, cap-and-trade carbon costs, and unique CARB diesel specifications mean California refiners and importers face additional compliance costs on top of the underlying commodity margin surge. California diesel prices could approach or exceed $6.00 per gallon if Goldman's $63 crack spread forecast holds through Q4 2026.
The Pacific Northwest — Oregon and Washington — typically prices within 20–40 cents of California diesel, reflecting shared West Coast refinery economics and pipeline constraints. Nevada and Arizona, dependent on California-origin fuel, follow similar patterns.
The Midwest presents a more complex picture. Illinois, Michigan, and Ohio benefit from proximity to BP's Whiting refinery — one of the largest and most complex in the US — and from pipeline access to Gulf Coast supply. Midwest diesel prices tend to lag West Coast moves by one to two weeks and absorb a smaller percentage of the crack spread increase at retail.
The Gulf Coast — Texas, Louisiana, Mississippi — is home to the US refining heartland. Retail diesel prices here are typically the lowest in the nation, but even Gulf Coast consumers will see meaningful price increases as wholesale diesel prices rise in response to the margin environment Goldman is projecting.
The Northeast, particularly New England, faces a structural disadvantage: limited pipeline connectivity means the region depends heavily on waterborne imports, and heating oil demand will begin competing with on-road diesel for distillate supply as fall approaches.
What Experts Are Saying
Goldman Sachs's commodity research team has effectively doubled its refining profit forecast for the sector, a revision that carries significant weight given the bank's track record in energy market analysis. The $63-per-barrel crack spread projection implies Goldman analysts see no near-term resolution to the structural diesel deficit — no surge in refinery capacity additions, no demand destruction sufficient to rebalance the market, and no geopolitical resolution that would restore Russian diesel flows to pre-2022 levels.
The EIA, in its Short-Term Energy Outlook, has consistently flagged below-average distillate inventories as a risk factor for diesel price volatility in 2026. The IEA has similarly noted that global middle distillate markets remain structurally tight. AAA, which tracks retail fuel prices daily across more than 85,000 US stations, has noted that diesel prices have remained elevated relative to historical seasonal norms throughout 2026. Analysts at energy research firms have pointed to the lack of new US refinery capacity — no greenfield refinery has been built in the US since the 1970s — as a structural constraint that prevents the market from self-correcting quickly when crack spreads surge.
What Drivers Should Expect
For fleet operators and individual drivers who rely on diesel — pickup truck owners, RV operators, small business owners running diesel vans — the Goldman Sachs forecast is a clear signal to take action now rather than wait. If crack spreads are already approaching $63 per barrel, retail diesel prices are likely to move higher in the coming weeks as wholesale contracts reprice and distributors pass through costs.
The most immediate practical step for diesel consumers is to fill tanks now, before the full retail price impact of Goldman's projected margin environment is reflected at the pump. Fleet operators with storage capacity should consider topping off bulk tanks at current prices. Drivers should use GasBuddy or the AAA TripTik fuel price tool to identify the lowest-priced diesel stations in their area — price dispersion tends to widen during volatile margin environments, meaning the gap between the cheapest and most expensive station in a given market can exceed 30–40 cents per gallon.
Looking further out, the Goldman forecast implies elevated diesel prices through at least Q4 2026. A reversal would require either a significant demand destruction event — a recession, a sharp slowdown in freight volumes — or an unexpected surge in refinery output. Neither appears imminent. Drivers and fleet managers should budget for diesel prices per gallon to remain at or above current elevated levels through the end of the year.