General Motors' active fuel management system is an ingenious piece of engineering. Here's what it does, how it works, and why some hate it.

A viral video sparks curiosity about diagnosing car problems with a smartphone, but experts say current tech isn't quite ready to replace mechanics yet.

One of the most problematic Harley-Davidson engines is the Milwaukee-Eight 114. These are some of the biggest problems owners ...

To celebrate HOT ROD's 75th anniversary, we teamed up with CASTROL GTX to bring you some of the stories that exemplify the core of what HOT ROD is and reflect the brand's influence on America's car ...