Pretty simple question actually (or so my ignorant mind thinks): At what compression ratio would an engine benefit from higher octane fuel? The Focus I drive is just over 10:1, and I've heard some say ...

Every car engine has quite a few details, ranging from cylinder count to compression ratios. How does changing the ...

Tucker Ryals;Gainesville, FL: I'd like to pose a question regarding an article Jeff Smith wrote on the Chevy 5.3L motor "Bolt On a Cam and Heads and Add 120+ HP" (April '08). I read the article with ...

Want to get into a heated argument? Try explaining to the public why unleaded is a nickel per gallon higher than regular or how regular and premium have changed in the last few years. Then clarify how ...

As you may know, an engine's compression ratio is directly linked to its combustion efficiency. All else being equal, higher-compression engines tend to make more power while offering better fuel ...

Everyone from Nostradamus to the Department of Energy predicts that internal combustion engines will provide primary propulsion for the majority of the vehicle fleet for a few more decades. But it's ...