The White House is evaluating regulatory options to expand sales of red-dyed diesel as U.S. diesel prices climb to record levels amid tightening global supplies. Policymakers are studying measures aimed at easing consumer pain after supply disruptions tied to the U.S. conflict with Iran, Ukrainian strikes on Russian refineries and shrinking inventories pushed wholesale and retail diesel costs higher.
Why the push now
Diesel in the United States reached a record $6.53 per gallon last week, according to Energy Information Administration data. That spike has prompted the administration to consider several steps - including broader access to red-dyed diesel - as it faces pressure to address rising fuel costs ahead of the November midterm elections. Officials have also discussed a blanket diesel export ban, voluntary export limits by refiners and have urged the European Union to release emergency diesel stocks to ease the market.
What red-dyed diesel is
Red-dyed diesel is, for all practical chemical purposes, the same as standard on-road diesel but is marked with a red dye to indicate its tax-exempt status. It is intended for off-road applications - equipment and vehicles that typically do not operate on public highways, such as farm machinery and construction equipment. Because it is sold for non-highway use, it is not subject to the highway fuel taxes that apply to diesel sold for road transport.
The red coloring is used as a tax-enforcement marker to show that highway taxes have not been paid. Using dyed diesel in vehicles driven on public roads is illegal and can trigger substantial fines because it constitutes tax evasion rather than because the product differs in fuel quality.
Several states have relaxed restrictions on the use of dyed diesel amid surging fuel costs, allowing more flexibility for eligible off-road users to access tax-exempt fuel.
How the tax treatment works
Highway diesel in the United States carries both federal and state excise taxes. At the federal level there is a diesel tax of 24.3 cents per gallon plus a 0.1-cent-per-gallon underground storage tank fee. Together these federal levies account for roughly 4% of a $6-a-gallon diesel price. State diesel taxes average about 35.5 cents per gallon, representing roughly 5% of current diesel prices.
How much diesel the U.S. uses
Off-road diesel makes up about 30% of total U.S. distillate consumption, equating to roughly 18.2 billion gallons each year, according to Jim Mitchell, an analyst at consultancy Wood Mackenzie. By contrast, the U.S. transportation sector consumes nearly 123 million gallons of diesel every day, or about 45 billion gallons annually, based on federal figures. That transportation-sector use represents roughly 75% of total U.S. distillate consumption of nearly 60 billion gallons per year.
What analysts say about widening access
Market observers and analysts caution that allowing broader sales of red-dyed diesel would not change the underlying supply picture that is driving record prices. Tom Kloza, chief energy adviser at Gulf Oil, said: "One doesnt have to pay federal and state excise taxes on dyed diesel, but it really doesnt shift the amount of overall diesel manufactured for domestic purposes."
Gregg Ibendahl, an agricultural economics professor at Kansas State University, added: "It would help less than it sounds like, and the version the administration can do without Congress wouldnt lower pump prices at all. Its a much safer idea than the export ban - mostly because it does less."
Preben Srli, an analyst at Rystad Energy, echoed that assessment: "While expanding access to the tax-exempt diesel could provide some relief to eligible end-users, it would not change the underlying wholesale diesel price. Refiners would still receive market price for their fuels, and the main effect would be lowering federal tax revenues. It would do little to change supply or market fundamentals."
Bottom line
Permitting wider sales of red-dyed diesel would reduce tax costs for those able to use the fuel legally, but it would not increase refinery output or alter the wholesale price signals that have pushed diesel to record highs. Analysts say the measure would mainly shift tax burdens and lower federal receipts while leaving the core problem - constrained supply - largely unaddressed.
The effectiveness of any administrative action will depend on the specific steps taken and the extent to which they change end-user costs without changing production or global inventories.