Diesel fuel marked for off-highway use may flow into truck stops after President Trump this week signed an executive order "temporarily" promoting red dye diesel — but industry leaders warn the tax exemption could turn into a liability for drivers and retailers who buy it now.

The order instructs Treasury Secretary Scott Bessent to "defer certain diesel fuel tax payment obligations and to provide penalty relief to the extent permitted by law." Red dye diesel is normally exempt from federal excise taxes only because it is restricted to farm equipment and other off-highway vehicles. On-highway use has always triggered the tax.

That restriction is the trap, according to fuel and transportation industry leaders who spoke to NBC. The savings truckers and truck stops capture today may simply become a tax assessment tomorrow.

What does the order actually change?

Very little, so far — and that is the core of the industry's warning. The mechanics of relief remain undefined in Washington.

"Whether relief is available, whom it covers, and on what conditions depend on Treasury determinations and guidance not yet issued," the Energy Markers of America said of the order. "Deferral is not forgiveness."

Until Treasury acts, neither truck stops nor drivers can know whether buying dyed fuel now shields them from the federal excise tax later, or merely postpones the bill.

Why are retailers holding back?

The Society of Independent Gasoline Marketers of America and the National Association of Truck Stop Operators told members they see where the White House is headed — and want no part of it.

"The White House appears to be trying to encourage the supply chain to move toward selling dyed fuel in non-traditional ways," the two groups wrote in a member note.

Their reasoning is bluntly commercial:

• The federal excise tax is still legally owed, so the upside for retailers is limited.
• Residual dye lingers in tanks and fuel systems, creating contamination risk.
• Liability and customer risk outweigh any temporary, uncertain benefit.

"We do not expect most reputable diesel retailers and fuel marketers to do this," the groups wrote.

For truck stops, the dye problem is physical, not just legal. Dye residue in storage tanks and dispensing systems can contaminate subsequent clear-diesel sales, exposing retailers to penalties and customer claims long after the deferral window closes.

What does it mean for truckers?

For owner-operators and small fleets, the math is even less attractive. A driver who fills with dyed diesel and runs it on-highway saves the excise tax at the pump — but if Treasury's eventual guidance treats that use as taxable, the deferred obligation lands on the driver, potentially with penalties attached depending on how far the relief stretches.

The Owner-Operater Independent Drivers Association offered a measured read. OOIDA President Todd Spencer acknowledged the red dye fix may offer temporary relief but argued it does nothing to fix the underlying cost problem carriers face.

"Allowing the wider use of red-dyed diesel will provide minimal relief. Market stability is essential to bring down costs for the long haul," Spencer said.

What comes next?

The practical decision point for shippers, carriers and fuel retailers arrives when Treasury issues its guidance under the order. Until Bessent's department defines who is covered and on what conditions, the industry consensus is that the tax on red dye diesel used on-highway is deferred, not dead — and operators who treat it as forgiven are betting on paperwork that does not yet exist.