The cost of a gallon of diesel, which has risen 1.5 percent over the past week, is 10.5 percent higher than a month ago.
Several states are seeing diesel prices north of $6 a gallon, including California ($6.514), Connecticut ($6.349), Massachusetts ($6.313), Maine ($6.286), and New York ($6.452).
Meanwhile, the national average price of regular-grade gasoline rose to a record of $4.418 per gallon.
Prices for diesel, which is utilized in industrial processes such as manufacturing, farming machinery, and freight transportation (semi-trucks, ships, and trains), had been on the rise before Russia's invasion of Ukraine, driven by supply concerns amid a decline in international refining capacity. This has some market analysts warning that prices could remain elevated because of spot shortages.
Market experts say the price gap between motor fuel and diesel fuel is the widest it has ever been.
"While motorists filling with gasoline have seen a slight rise in prices, diesel’s surge will be a double whammy as diesel prices will soon be passed along to retail channels, further pushing up the cost of goods."
In addition, federal and state taxes applied to diesel add to growing cost pressures. The federal tax on diesel is 24.4 cents per gallon, while the federal levy on gasoline is 18.4 cents a gallon.
Refiners have had a challenging time keeping up with soaring demand, resulting in surging prices. In the United States, refiners pay only about $100 a barrel to buy crude oil, but they receive an average of $150 from the sale of gasoline and diesel at wholesale prices.
Moreover, refiners are scheduled for nonessential maintenance, although industry observers believe that many of these companies will run operations continually into the early fall.
Still, energy analysts concede that any acceleration in diesel production will be unable to refill depleted inventories and resuscitate pre-crisis levels.
"Of course, there is also the fact that we have sanctions on Venezuelan oil and the Russian Ukraine war but at the end of the day, the diesel shortage in the U.S. is a product of the green energy movement which led to underinvestment in the U.S. refining space."
While the U.S. diesel market is extremely tight, the situation in Europe could shift into a "full squeeze," says Janiv Shah, a Rystad Energy analyst.
"Banning oil and product flows from Russia to Europe would create a seismic shock, with more than 55% of European imports of diesel and gasoil coming from Russia," he wrote in a note.
"European refineries output was already expected to drop in March and April due to the impact of Russian supply shortages. The reduced local supply of finished products and import shortages is expected to keep prices at the pumps high for consumers."
Ultimately, market analysts warn that diesel is playing a significant role in global price inflation.
June West Texas Intermediate (WTI) crude oil futures were trading above $106 per barrel on the New York Mercantile Exchange. June natural gas futures rose $0.06, or 0.82 percent, to $7.709 per million British thermal units (Btu). June heating oil futures fell $0.13, or 0.34 percent, to $3.938 a gallon.