Originally published at: The DEF Rules Changed This Week. Here Is What the Guidance Actually Says — and What It Does Not. - FreightWaves
If you have spent any time in trucking Facebook groups, diesel forums, or on X this week, you have probably seen some version of this story: The EPA removed DEF requirements. The DOJ said deletes are legal. DPF is going away. The whole emissions system is getting scrapped. Trump said you can modify your truck.…