EPA Rolls Back DEF Rules: What Actually Changed for Diesel Truck Owners

Send us Fan Mail The EPA has released its long-awaited proposal to revise the 2027 heavy-duty diesel emissions rules, but does it mean diesel owners can finally delete their trucks? In this episode, Tim Esterdahl breaks down what the proposal actually changes, including the plan to eliminate many DEF-related engine derates, reduce warranty requirements and delay some emissions durability standards. He also explains what didn't change, why DEF systems and emissions deletes remain a hot topic, ...