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.

Add Yahoo as a preferred source to see more of our stories on Google. As engine standards change, the oil that protects them has to change too — especially for drivers buying new trucks in the next ...

When you take your vehicle in for an oil change — or change you oil yourself if you're so inclined — you probably don't give much thought to what's in the fluid being drained. It might not occur to ...

While everybody knows what the oil pump's job is and why it's there, few enthusiasts consider the lowly bubbler as a possible engine tuning resource. We've come to appreciate that it takes power to ...

Is there a way to have your engine oil tested to see how it is holding up or if it's right for your engine? I have the cheapest company stock put in, but sometimes I notice that certain oil is more ...