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 ...

Diesel fuel goes bad with time, but additives can make it last longer and improve performance. Photo credit: David Traver Adolphus / AutoGuide.com. If your diesel car, truck, or even farm equipment ...

Before we get into this discussion about the best diesel fuel additives, it's important to understand exactly what diesel additives are. During the refining process, diesel fuel receives a rating ...