4. Low rpm and high flow-velocity intake and exhaust systems are requisites of good high-compression fuel economy engines. Such characteristics make an engine "think" it's operating at a higher rpm.

By Jim McFarland Low- And High-Compression Fuel Economy Engines: The Techniques Are About The Same, But The Approach To Each Is Somewhat Different. A.Most stock ...

Mazda enters the revitalized straight-six game with a fascinating engine running all sorts of neat features. We dive in deep on the CX-90's mill here.

In this video, we're doing a detailed comparison of petrol, or spark ignition, and diesel, or compression ignition engines.

Thankfully, gasoline with increased octane ratings prevents knock in high-compression engines, and even lets your Ford EcoBoost engine actually make its advertised horsepower.

Premium gas has a higher octane rating, better resisting high-pressure engine conditions for improved performance and efficiency. High-performance, turbocharged, or high-compression engines ...

Emissions controls would see the high-compression engines consigned to the history books. With catalytic converters proven to provide a cleaner exhaust, engines would have to be ready to accept them.

Premium gas, also known as high-octane gas, can withstand more compression, but is it ideal for your lawn mower? What are the long-term effects?

Like all other forms of engine and vehicle modification, a supercharger unit should be matched to the vehicle's performance level, type of driving, and budget for optimal results. This means ...