Pickup Truck +SUV Talk on MSNOpinion

EPA rolls back DEF rules after months of diesel delete buzz: Here’s what actually changed

For months, diesel truck owners have wondered whether the Trump administration would dramatically roll back EPA emissions ...
Motor Trend

What Is DEF and How Does It Work?

Long-haul truckers and diesel engine enthusiasts had to rethink their entire operations in 2010 when the Environmental Protection Agency mandated selective catalytic reduction technology. Selective ...