The practice known as “rolling coal” occurs when a diesel truck is modified so that it can intentionally blast black smoke in abundance, and its origins can be traced back to truck pulling or ...

“Kinda the reason the EPA is shutting everyone down. Worst thing you can do is bring attention to diesel trucks by rolling ...

New Jersey's S2418 (full text, here) now specifically "prohibits retrofitting diesel-powered vehicles to increase particulate emissions for the purpose of 'coal rolling;' prohibits the practice of ...

An Illinois state representative proposes a $5,000 fine for any drivers who tamper with the EPA-mandated emissions equipment on their diesel-engined ... what's called "Rolling Coal." ...

The diesel is definitely running rich enough to roll some coal, though whether it's an intentional tune for that or just a side-effect of extra power is unclear. A stock 2020 GMC Sierra HD Denali ...