Diesel engines power more than you may realize. While diesel was once considered a useless byproduct of the crude oil refinery process, it's now responsible for powering everything from freight trains ...

Elizabeth Nelson, coolant program manager at Polaris Laboratories, a fluid-analysis company in Indianapolis, Ind., tells a story that would strike fear into the heart of any fleet manager. A class-8 ...

Diesel engines have some major advantages, like increased durability, greater fuel efficiency, and more torque than a gasoline equivalent. Like gasoline and kerosene, the fuel itself is refined from ...