The West Coast Fuel Squeeze Isn't Where the Headlines Say It Is

Stock figures reflect EIA Weekly Petroleum Status Report data through the week ending 29 May 2026.

A run of recent coverage has warned that the U.S. West Coast is about to run short of jet fuel, with Asian export supply drying up just as California sheds refining capacity. The warning has the wrong fuel. As of the week ending 29 May, West Coast jet fuel stocks sat at 10.8 million barrels — about 7% above their five-year average for this time of year, near the top of their seasonal range. Jet fuel is the one West Coast product that is comfortable right now.

The fuels that are actually tight are the ones nobody is writing about. West Coast diesel stocks were 10.0 million barrels, barely above their five-year seasonal low and 11.7% below the seasonal average. Gasoline was 27.1 million barrels — essentially sitting on its five-year seasonal floor. Both are scraping the bottom of the range they have occupied in late May over the past five years. The squeeze is real. It is just not the squeeze that made the headlines.

The tightness that doesn't show up nationally

The reason this gets missed is structural. The widely-watched U.S. petroleum stock figures are national totals, and the national total is dominated by the Gulf Coast — PADD 3 — which holds the bulk of the country's refining and storage. In the same week that West Coast diesel was sitting on its seasonal floor, national distillate stocks actually rose by about 1.5 million barrels. A reader looking only at the national distillate number would conclude diesel supply was loosening. On the West Coast, the opposite is true.

This is the defining feature of PADD 5 and the reason it deserves its own gauge. The West Coast — California, Oregon, Washington, Nevada, Arizona, plus Alaska and Hawaii — is effectively an island fuel market. No major product pipeline crosses the Rocky Mountains to connect it to the Gulf Coast refining belt. When the West Coast runs short, it cannot simply pull barrels west through a pipe the way the East Coast pulls from the Gulf. It has two options: make more locally, or import by sea. Both of those options are getting harder at the same time.

What the West Coast has on hand

Scored against its own five-year seasonal band — the min, max and average for the same calendar week over the prior five years, which is the only honest way to read a number that swings with the season — the picture for the week ending 29 May is split three ways:

Diesel / distillate — tight. 10.0 million barrels, sitting in the bottom few percent of its five-year seasonal range and 11.7% under the seasonal average. This is the fuel that moves freight, runs the rail network, and powers Central Valley agriculture through the growing season. It is low at exactly the wrong time of year.

Gasoline — tight. 27.1 million barrels, essentially at the five-year seasonal floor and 7.5% below average, heading into the summer driving season and California's switch to its more expensive summer-blend CARB-spec fuel. California already runs the highest pump prices in the country; this is the inventory backdrop going into peak demand.

Jet fuel — comfortable. 10.8 million barrels, 7% above the five-year average and near the top of its seasonal range. The headline risk is the one fuel currently in the best shape.

California remains the most expensive U.S. gasoline market by a wide margin. AAA put the state average for regular at about $5.95 a gallon on 5 June 2026, and EIA's latest weekly print showed $5.85 for the week of 1 June — against a U.S. average of $4.31. That is the price level the seasonal-low gasoline inventory is sitting beneath as summer demand arrives.

That does not mean the jet-fuel warnings are baseless — but they are about the future, not the cupboard. In 2025 the West Coast imported roughly 93,000 barrels per day of jet fuel, around 80,000 of it from South Korea, and Korean export availability is tightening. The jet-fuel story is a forward-looking supply-chain story about where the next barrels come from. The diesel and gasoline story is a right-now inventory story. They are different kinds of risk and should not be filed under the same headline.

Why it can't just truck more in

When a region runs short, the obvious question is why it doesn't import its way out. The West Coast can, and does — but the channel is narrow and expensive for three compounding reasons.

The first is the Rockies: no large-scale product pipeline connects PADD 5 to the Gulf Coast, so domestic resupply has to come by ship. The second is the Jones Act, which requires cargo moving between U.S. ports to travel on U.S.-built, U.S.-flagged, U.S.-crewed vessels — a small and costly fleet — which makes moving a barrel from Houston to Los Angeles by sea uncompetitive against importing one from Asia. The third is California's own fuel specification: CARB-spec gasoline is made by relatively few refineries outside the state, so the West Coast cannot freely substitute a cargo of ordinary gasoline from elsewhere. The marginal barrel that balances the West Coast market therefore tends to arrive from across the Pacific, on a longer and pricier supply line than any other U.S. region relies on. That is manageable in normal times. It is fragile when local supply drops.

The capacity that just left

Local supply is dropping. Phillips 66 shut its Los Angeles-area refinery — roughly 139,000 barrels per day of capacity — in November 2025. Valero's Benicia refinery in the Bay Area, around 145,000 barrels per day, has now stopped producing fuels: the plant was idled through a phased process and its fuel-production units had ceased operation by the end of April 2026. The site has not been confirmed as sold. Valero says it remains in discussions with state officials and is evaluating strategic options for the Benicia assets while maintaining supply through inventories and additional gasoline imports — and California's Energy Commission had spent much of 2025 engaging market players in an effort to find a buyer who would keep it running. Between them the two plants represent close to 285,000 barrels per day, on the order of a sixth of California's in-state refining capacity, concentrated in a market that cannot easily import the difference.

Economists at UC Davis have projected the combined effect of the two closures at roughly $1.21 per gallon of additional pump cost by August 2026 — about 40 cents attributed to the Phillips 66 closure and a further 81 cents to Benicia. Those are projections, not prints, and the Benicia component should be read as a closure/idling scenario rather than proof of a completed sale. But they frame the stakes: a structurally short, import-dependent market is losing a meaningful slice of the local production that was keeping it balanced.

What it actually means for the West Coast

Pull the threads together and the realistic picture is neither "the lights go out" nor "nothing to see here."

The West Coast is not about to run out of fuel — markets don't run out, they reprice and reroute. What the data shows is a market entering summer with diesel and gasoline already at five-year seasonal lows, a thinning base of local refining, and a resupply channel that runs to Asia rather than to Texas. That combination does three things. It keeps West Coast pump and diesel prices structurally above the rest of the country. It deepens dependence on imported cargoes and therefore on the reliability of distant suppliers. And — most importantly — it removes the cushion that absorbs shocks. A single unplanned refinery outage, always a risk in the summer, now lands on a thinner inventory base than it would have a few years ago, which is how the West Coast tips from "expensive" to "spot shortage and allocation" faster than any other U.S. market.

For the people who actually feel it, that means truckers, freight operators and Central Valley agriculture absorbing the cost of seasonally low diesel; drivers facing the highest gasoline prices in the country going into the summer; and, eventually, the forward jet-fuel question landing on West Coast airports if Asian supply keeps tightening — even though jet is the comfortable fuel today.

The three things worth watching are straightforward. Whether Benicia actually closes or gets sold. Whether Asian — particularly Korean — jet and diesel cargoes keep flowing west. And whether the diesel and gasoline seasonal lows deepen as summer demand arrives. None of those is visible in the national stock figures. All three are visible on the West Coast.

Sources

West Coast (PADD 5) product stocks, week ending 29 May 2026: U.S. Energy Information Administration, Weekly Petroleum Status Report — PADD 5 weekly ending stocks. Distillate fuel oil (series WDISTP51), total motor gasoline (WGTSTP51), kerosene-type jet fuel (WKJSTP51). eia.gov/dnav/pet/pet_stoc_wstk_dcu_r50_w.htm

Five-year seasonal band: AmericasOilWatch calculation. For each fuel, current stocks are compared against the minimum, maximum and average of EIA weekly observations falling within ±10 days of the same calendar week over the prior five years (14 comparable observations for this week). "Low/ample for season" describes where current stocks sit between that five-year seasonal low and high — not a percentile of the full distribution.

National distillate build: EIA Weekly Petroleum Status Report, U.S. distillate fuel oil stocks (series WDISTUS1).

Phillips 66 Los Angeles closure (~139,000 bpd, November 2025) and combined ~285,000 bpd / ~a sixth of California capacity: Reuters and trade-press coverage of California refinery closures; RBN Energy, "California Refinery Closures, Persian Gulf Issues Strain PADD 5 Product Supply." rbnenergy.com

Valero Benicia (~145,000 bpd) idling: Argus, 30 April 2026 — Valero "stopped producing fuels" and "ceased operation of the fuel production units" at the Benicia refinery after phased idling earlier in 2026. Valero investor materials and the company's Benicia refinery statement note it is evaluating strategic options for the assets and expects to import additional gasoline volumes. The refinery has not been confirmed as sold as of June 2026.

California Energy Commission buyer search: Reuters, July 2025 — California officials and the CEC were "engaging with market players" to explore continued operation of Benicia. No sale had been confirmed by June 2026.

UC Davis pump-price projection (~$1.21/gal by August 2026; ~40c P66 + ~81c Benicia): UC Davis economists, as reported in California energy-policy coverage; to be read as a closure/idling scenario, not a completed sale. Yahoo Finance summary

California and U.S. retail gasoline prices: AAA — California regular gasoline state average ~$5.948/gal on 5 June 2026 (highest state average; Washington $5.650, Hawaii $5.614). EIA Weekly Retail Gasoline Prices — California regular $5.853/gal versus U.S. average $4.305/gal, week of 1 June 2026.

West Coast jet-fuel imports (~93,000 bpd in 2025; ~80,000 bpd from South Korea) and tightening Asian export availability: Kpler analysis as reported by gCaptain. gcaptain.com

PADD 5 island-market geography (no trans-Rockies product pipeline; Jones Act resupply constraint; CARB fuel specification): EIA and Stillwater Associates PADD 5 fuels analysis; standard West Coast market structure.

AmericasOilWatch standard methodology applies: every load-bearing number traces back to a named institution, and the West Coast stock figures here are the same EIA series that drive the live PADD 5 gauge on the dashboard.