What in the heck is "illegal fuel"? Does NC have a ban on out-of-state diesel?
Off road diesel that does not include the tax in the sales price and is died red so that it can be recognized an fuel that was not taxed for road use.
You can get fuel for generators and farm use that is dyed differently to indicate its tax status. For example, you aren't allowed to buy fuel oil for your "furnace" and pump it into your diesel car.
One possibility - Dyed diesel fuel for off highway (agriculture) use.
they have been doing this for years to 18 wheelers.you have to pay the tax in each state whether you buy the fuel or not.this is what keeps nm. and az. afloat.
How would they be able to discern the difference between diesel fuel produced from cooking oil, and diesel fuel produced from crude oil?