The cost of a gallon of diesel has been up 1.5 percent over the last week. Retail diesel prices are also 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).
The national average gas price hit a new all-time high of $4.418 per gallon.
Diesel is utilized in many industrial processes, such as manufacturing, farming machinery, and freight transportation (semi-trucks, ships, and trains).
Diesel prices 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 due to spot shortages.
Market experts purport that the price gap between motor fuel and diesel fuel is the widest it has ever been.
In addition, the 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 to buy crude oil, but they receive an average of $150 a barrel from the sale of gasoline and diesel at wholesale prices.
Moreover, refiners are scheduled for non-essential 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.
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," Shah 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 tumbled $0.035, or 0.45 percent, to $7.692 per million British thermal units (Btu). June heating oil futures plunged $0.1206, or 3.05 percent, to $3.8307 a gallon.
