Just a few months ago, I wrote about how Nissan was able to produce a road-going engine with a thermal efficiency—the amount of energy produced versus wasteful heat—of 42%, beating out the likes of ...

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 ...

2.Reduced engine rpm (without attending losses in net torque) tend to improve overall fuel economy and driveability. 3.Treat multi-cylinder engines as a combination of several single-cylinder engines, ...

Compared to older days, gas prices haven't exactly been kind over the last few years, and with continued instability around the oil-producing parts of the world, it may not get much better anytime ...