Evan Williams is an automotive journalist and mechanical engineering technologist with more than a decade of experience in the industry. He has written for the Toronto Star and AutoTrader Canada and ...
President Donald Trump and the U.S. Environmental Protection Agency announced guidance allowing the removal of the DEF sensor requirement for all diesel equipment. EPA said sudden speed losses caused ...
The U.S. Environmental Protection Agency on Friday said it is dropping the requirement for diesel exhaust fluid (DEF) sensors as part of a truck's aftertreatment system in favor of monitoring actual ...
Gasoline and diesel engines are very different. The former rely on spark ignition while the latter use compression ignition. Diesel engines typically run at much higher compression ratios than ...
It's been a busy few weeks for emissions regulations in trucking. The Department of Justice just backed off criminal prosecution of "diesel delete" cases. Days later, the Environmental Protection ...
The United States Environmental Protection Agency has changed its tune on diesel trucks under the current administration. Whereas previous versions of the EPA pursued massive penalties and even ...
The data collected will allow EPA to independently evaluate ongoing system failures. As of Feb. 2, engine manufacturers have 30 days to provide EPA with data on model years 2016, 2019 and 2023 ...
EPA Forcing Diesel Engine Makers Reveal DEF System Repair History, Eliminate DEF? Posted: February 3, 2026 | Last updated: April 11, 2026 Breaking news, the EPA is forcing engine makers to reveal the ...
With a Master's degree in English Literature and six years of writing experience, Aayush has been contributing to TopSpeed for over two years. Since 95% of his personality is motorcycles, he goes ...
Advancements in CNG engine performance now rival diesel engines in power and torque, making them more attractive for commercial use. CNG trucks incur higher initial costs due to complex fueling ...
GM pickups powered by a Duramax diesel engine offer loads of benefits, including strong low-end torque and impressive real-world efficiency. However, diesel engines also require some specialized ...
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Modern Diesel Engines Still Have a Place
A concise look at why modern diesel engines remain useful despite past controversies. The video explains how current Euro 6 diesel technology reduces emissions, improves efficiency, and delivers ...
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