San Francisco diesel prices approach historic peak

Why It Matters

Prior to the war, around 20 percent of global oil supply passed through the Strait of Hormuz, and its effective closure by Iran has resulted in a 95 percent decline in these transits compared to pre-conflict levels.

The blockade has driven up oil prices and domestic pump costs, raising fears that alongside disruption to other shipments—this could soon fuel an economy-wide inflation surge.

Diesel is the backbone of the U.S. supply chain—powering trucks, ships, farm equipment, and construction machinery. When diesel prices spike, transportation and production costs rise, often leading to higher prices for food, goods, and services.

California’s fuel market is uniquely vulnerable due to refinery constraints, environmental regulations, and limited pipeline access, making price swings more extreme.

What To Know

California’s statewide diesel average is $7.63, the highest in the country by a wide margin.

Diesel is in tighter supply than gasoline because it requires a different refining process and competes with jet fuel and heating oil for production. Global disruptions have squeezed distillate supplies, pushing diesel prices up faster than regular gas.

West Coast refinery outages and limited capacity have added extra pressure, especially in the Golden State. Trucking, agriculture, and shipping rely heavily on diesel, so demand stays high even when prices spike.

The current national average price for regular gasoline is about $4.10 per gallon, according to data from AAA. In contrast, California’s statewide average is roughly $5.92 per gallon, nearly $2 higher than the national average.

Meanwhile, President Donald Trump wrote on Truth Social on Saturday Iran has 48 hours to open the Strait of Hormuz or “hell will reign down on them.”

De Haan wrote on X on Saturday morning that “more escalations like this likely mean oil prices continue heading higher when markets open tomorrow night. We’re going to see a dozen states and more push higher gas prices down around mid-day Monday, especially in price cycling states,” adding that people should “be prepared.”

Why Are Gas Prices Higher in California?

California uses a special cleaner‑burning fuel blend that few refineries can produce, making supply tighter and more expensive.

The state also has some of the highest fuel taxes and environmental fees in the country, adding significant cost at the pump.

Limited refinery capacity and no major pipelines connecting California to the national fuel network mean disruptions hit harder and last longer. Strict environmental regulations further raise production costs.

Some Republican lawmakers and officials often argue California’s high taxes and environmental regulations are the primary drivers of the state’s elevated fuel costs, pointing to the state’s special fuel blend requirements, which they say limit supply and make California more vulnerable to refinery outages.

Some Republicans also criticize California’s cap‑and‑trade program and climate policies, saying these add layers of cost that other states don’t face.

What People Are Saying:

Steve Hilton, Californian GOP gubernatorial candidate, told the New York Post last week after Australia announced it would slash its fuel excise tax in half for a few months: “Any decent governor who cared about regular working people would have done this weeks ago…But Gavin Newsom is an out of touch elitist climate fanatic whose only interest is taking potshots at President Trump to push his pathetic book and presidential campaign.”

He added: “Their [Newsom and Democrats] gas tax gouging and their insane climate policies driving up the cost of oil.”

AAA said in a press release earlier this week: “Crude oil prices have been surging, surpassing $100/barrel, as the conflict in the Middle East continues and the Strait of Hormuz remains closed. In 2022, gas prices remained elevated from March through August, peaking in June when the national average reached a record of $5/gallon for one week.”

What Happens Next

Fuel analysts expect continued volatility in the coming weeks, especially if refinery maintenance or global supply issues persist.

California regulators are monitoring the market but have not signaled any immediate intervention.

If San Francisco crosses the $8 threshold, it could signal further increases across the state as summer demand approaches.