While we like to think of 2002 as being part of a high-tech age, our beloved internal combustion engine hasn't really changed much in the last 50 years. We're still using pushrods and overhead valves, ...

Mazda Motor Corporation is the company making the claim, saying it’s done it with the SkyActiv-D engine, an innovative powerplant that efficiently operates on only a 14:1 ratio (diesel manufacturers ...

Low- And High-Compression Fuel Economy Engines: The Techniques Are About The Same, But The Approach To Each Is Somewhat Different. A.Most stock cylinder heads have factory-cut undercuts of the type ...