Editor's Note: The purpose of the Shop Series has been to acquaint and enlighten the car enthusiast with some of the more involved aspects of automotive mechanics, vehicle repair and modification. As ...

If there's one question that's forever on the lips of car enthusiasts, it's how much horsepower an engine makes. Answering that question is deceptively complicated, however, because of what the term ...

Researchers studying a hydrogen combustion concept built around argon gas say the technology could reach 60% thermal efficiency while matching the power output of a conventional diesel engine. The ...