Engine oil is an absolutely crucial item for any car, regardless if it's diesel or gasoline. Is it normal for the oil in diesel engines to turn black?

A model walks the runway at the Diesel Black Gold Fall 2012 show during New York Fashion Week. Randy Brooke/WireImage Inspired by the pages of pulp fiction, Diesel’s high-end contemporary line ...

When you see black smoke from your diesel car or truck, the first thing to check is the air filter. A clogged air filter causes incomplete combustion, as do dirty fuel and oil filters.

Diesel Black Gold has combined its men’s and women’s runway shows, and will debut its upcoming Spring-Summer 2018 collection during Milan Men’s Fashion Week in June.

Diesel Black Gold Resort 2013. By Tim Blanks. May 31, 2012 View Slideshow. Sophia ... Anne Valérie Hash. Resort 2013. The latest fashion news, beauty coverage, celebrity style, ...