You can tell when a diesel truck is about to roll coal. Typically, they’ll slow down suddenly, to give themselves enough space to nail the throttle, thus dumping as much fuel into their modified ...

A social media video that garnered nearly 50,000 viewers shows the harmful effects diesel engines can have on the environment. In the 27-second video posted by Occupy Mars (@TESLA_winston) on X, ...

There’s nothing cool about rolling coal, also known as coal rolling. To those unfamiliar with the practice, it entails a diesel truck spewing a thick plume of black smoke on unsuspecting cyclists, ...

A couple of months ago I was driving west on Jefferson Boulevard, heading away from downtown, when I noticed in the distance a huge cloud of smoke. It wasn’t a fire. It was coming from a car, and ...

It's standard for older diesel engines to emit black smoke under full load, which occurs during "turbo lag." As the diesel engine waits for the turbo to spool, the machine will blow thicker black ...

Starting in 2026, diesel owners and repair shops will no longer run the risk of federal criminal chargers for performing two common engine mods.