Instead, it is pumped into a separate reservoir through a separate nozzle at diesel gas pumps and injected into hot exhaust, reducing by an estimated 90% the harmful emissions of diesel engines ...

Improving your diesel engine's exhaust sound is about fine-tuning ... Also, this modification affects the vehicle's emissions ...

and carbon dioxide emissions by reducing undesirable deposit formation in diesel engine exhaust systems.

Leading truck maker Hino Motors Ltd. admitted to falsifying the results of tests for exhaust emissions and fuel economy of three types of engines over a number of years. It became a subsidiary of ...