Can You Run Red Diesel in a Truck? What the IRS Relief Means

On 14/10/26 the IRS put out a notice saying it won't impose federal penalties for dyed diesel sold or used on highways. It's backdated to 01/10/26 and runs through 31/12/26. It also covers penalties for missed semimonthly tax deposits and thin records.

This came after an executive order on 05/10/26 aimed at easing diesel costs. The IRS hasn't yet spelled out what happens with the postponed federal tax payments. More guidance is coming, so watch for it.

The federal tax on diesel is 24.4 cents a gallon. That's the amount you'd save by using dyed fuel, and it's the number to keep in your head.

The IRS relief is federal only. It doesn't touch state fuel taxes or state dyed-diesel rules. Overdrive reports that most states that loosened their rules did it for farm or timber use, not for regular trucking. At least 11 states have issued some kind of dyed-diesel relief, but you have to read what each one actually covers.

IFTA says dyed diesel can't be used broadly across the U.S. and Canada unless every member jurisdiction issues its own order. So an OTR run through several states is the tricky case. You might be fine in one state and get a citation in the next.

Do the math with your own numbers. Overdrive used an example: a fleet fuel-card discount of 50 cents a gallon on 250 gallons saves $125. The federal relief on the same 250 gallons saves about $61 (250 × 24.4 cents). In that example the card wins by $64.

If you don't get a discount, the $61 looks better. If you already get a strong discount, switching may not help. It also depends on whether the state you're in lets you do it at all.

Some states have their own fuel tax breaks. North Carolina is at zero cents a gallon from 10/10/26 to 30/11/26, Georgia suspended its tax from 29/09/26 to 05/11/26, and Ohio has a near-zero rate from 04/10/26 to 02/01/27. Those might save you more without any dye risk. Confirm the details with the state before counting on them.

Here's the part people forget. The source Overdrive quoted says red dye can stay in your fuel system for up to six months unless you flush it. So a roadside check could come after the federal relief ends and find dye in your tanks.

If you're leasing on or running for a carrier, talk to them first. It's their equipment and their insurance. Overdrive also covered engine and warranty concerns in a separate article, so look at that before you decide.

Quite a bit. The IRS hasn't said how the postponed tax gets paid. It's also not fully clear how dyed fuel burned in states without relief will show up in your final tax bills. OOIDA called the executive order "minimal relief" and said the market needs broader stability.

So what do you do? Check with your carrier, your fuel-tax preparer and the state agencies on your route. Don't take advice from a post on the internet, including this one, as the final word on your own situation.

Red diesel relief is real on the federal side and limited everywhere else. For most OTR drivers crossing state lines, the safest move is probably the same as before: use the fuel your carrier and your state say is legal, and look for savings in your fuel card and your route.

And since fuel is eating into everyone's settlement right now, it's worth asking any carrier you talk to how they handle fuel cards and fuel costs before you sign on.