FRANKFURT, Germany — In 2014, as evidence mounted about the harmful effects of diesel exhaust on human health, scientists in an Albuquerque, New Mexico, laboratory conducted an unusual experiment: Ten ...

INDIANAPOLIS—While clean energy is the future, diesel will primarily power trucking’s near future. But as more U.S. fleets face a patchwork of regulations nationwide, planning will be imperative. “The ...

In the U.S., Diesel has mostly been more expensive than gasoline for nearly twenty years. The price gap came about as new rules for cleaner diesel took effect in 2006, as refineries had to run extra ...