DEF is a key component in lowering pollutants emitted from diesel engines, helping to reduce harmful emissions.

Wyoming Sen. Cynthia Lummis introduced a bill Tuesday to end emissions requirements and prosecution of diesel “delete” ...

Small speed reductions and mindful driving can improve diesel mpg by 3–5%, saving fleets thousands in fuel costs. Smart route ...

It has been a decade since the VW Dieselgate scandal broke out, but the saga continues – with other automakers.

The bill would remove the requirement for emissions control devices and onboard diagnostics systems and remove penalties for ...

Five automakers including Stellantis, Ford and Nissan have been accused in London’s High Court of cheating emissions rules ...

The Audi R8 Performance equipped with an OPF delete, captured during dyno runs and test sessions. Featuring its high-revving ...