High Detergent? High Definition? Howdy Doody? Just what, exactly, does it mean when the label on your vehicle's motor oil uses the initials HD?

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 ...

In the world of automotive engine oils, 0W-20 is one of the thinnest, though oils as thin as 0W-8 are now used. The 0W stands for 0-weight in winter, and the 20 stands for 20-weight when the oil is ...

Under normal circumstances, most modern engine oil and gasoline brands work fine on their own to keep your engine running smoothly. But there may be cases where even the best of them could use a ...

Walk into any parts store and you'll see the rows of glossy bottles promising to stop engine wear, boost fuel economy, and make your old clunker run like it just rolled out of the factory. The auto ...

Some folks impacted by the L87 engine recall should now be running an updated oil spec, which has us wondering - how's your unreplaced L87 engine doing so far?

Current production cars are capable of much longer tenure on the road than in decades past. Odometer numbers well in excess of 100,000 miles are a testament to enhanced engineering, fuel injection, ...

Engine oil is not only a lubricant but also a vital indicator of engine health. Comprehensive analysis and degradation monitoring techniques enable the detection of chemical and physical changes that ...

Love racing, but not a fan of the sport's carbon footprint? Idemitsu is hoping to bring that down a notch with its new Plantech Racing engine oil, which uses plant-based raw materials for more than 80 ...

Don't ignore what your car is trying to tell you. Here are four critical indicators that your card engine is on the verge of ...