One of the most recognizable semi truck features are the vertical exhaust stacks. Other than looking cool, do they actually serve any purpose?

Putting stacks anywhere on a Ford Ranger-type truck - which runs on gas, not diesel - is unusual, said Josh Stewart, technical specialist at Ohio-based exhaust manufacturer Grand Rock.

If you see those weird-looking vented exhaust tips on diesel trucks, it means the exhaust has an active DPF regeneration system.When the system injects fuel into the already-hot exhaust stream ...

What is diesel exhaust fluid and why is it more important than ever? Diesel truck enthusiasts, long-haul truckers and especially fleet managers collectively had a Chicken Little moment way back in ...

The U.S. could be facing a shortage of diesel exhaust fluid, which is necessary for trucks manufactured after 2010. A driver fills up the tank of his car with diesel at a fuel station on ...