Engine oil color reveals its age, contamination level, and operating condition. Fresh oil is amber or light brown. Oil darkened to black but still translucent after a few thousand miles is normal.

The emission measurement procedure using the “free acceleration” method has caused many diesel vehicle owners to worry about engine impact.

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 ...

The Duramax diesel engine has seen quite a few changes over the years. Here's what separates some of the most popular ...

Formula 1's governing body, the FIA, has announced a resolution to the sport's regulatory row over engine compression ratios, with a tweak to the regulations set for June 1 and a further change in ...

The turbocharger is more popular than ever, appearing on the Ford Mustang, the Dodge Charger, and the Chevrolet Corvette. It's used in Ferrari and Lamborghini products, too, and even with the rise of ...

The FIA have announced changes to Formula 1's power unit regulations, most notably surrounding compression ratio, which have caused controversy over the winter. When the 2026 power unit regulations ...

Brett T. Evans has more than a decade of experience driving, writing about, and evaluating automobiles. His early career comprised writing about pre- and post-war classic cars, as well as late-model ...

AURORA, Colorado—Test engines meant to keep the B-52 Stratofortress in the skies through the bomber’s 100th birthday are expected to be delivered in 2027 after recent key performance evaluations, ...

Formula One’s governing body, the FIA, and rival engine manufacturers have reached a compromise solution to tackle the controversy surrounding Mercedes that had threatened to overshadow next week’s ...