EPA demands DEF failure data from diesel makers. Investigation could force recalls and software fixes for engines already on U.S. roads. 30-day deadline set.

Fleet managers can use the DOE’s 2026 Fuel Economy Guide to benchmark MPG across powertrain types using side-by-side vehicle ...

Removing an emissions device, while no longer a criminal matter, still represents risk for haulers. One responded to EPA and DOJ's recent moves on DEF faults and diesel derates, even questioning ...

Crystal contamination can be eliminated by adding Rislone DEF Crystal Clean® Diesel DEF & SCR Emissions System Cleaner (part ...

Following Monday’s right-to-repair announcement, EPA is demanding DEF failure data from engine makers, targeting shutdowns ...

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 ...

We have all seen it happen. One minute your post 2011 diesel is pulling horses or hauling a gooseneck full of cattle to the feedlot. The next, a DEF warning light flashes and your dependable pickup ...

ORLANDO, Fla. (AP) — Outdoor Christmas decorations aren't flying at U.S. Air Force base housing in the Florida Panhandle, at least not before Thanksgiving. The private company that operates a ...

If you regularly drive a modern-day diesel-powered vehicle, chances are, you know what Diesel Exhaust Fluid (DEF) is. A crucial component used by most modern vehicles with diesel engines, DEF — which ...

We may receive a commission on purchases made from links. The government's strict emissions limits for combustion-powered vehicles have pushed automakers to develop technologies that let their engines ...

SAO PAULO, Oct 6 (Reuters) - Brazil may not be able to raise the mandatory biodiesel mix in diesel to 16% from 15% within a government-set deadline of March 2026, an official from the Brazilian ...