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.

A mechanic cracked open a neglected engine and what he found was brutal.

Push your muscle car to the limit, and sooner or later you may run into some oiling issues. Since we've already covered basic oil system tech in the past, we decided to focus our efforts on hard-core ...