Most people are familiar with the importance of oil for the internal combustion engines that power our modern vehicles. The petroleum-based fluid is designed to provide lubrication to the vast amount ...

DETROIT - In the latest example of Volkswagen of America Inc.'s quality woes, the automaker is warning 426,000 VW Passat and Audi A4 owners of an engine oil sludge problem. Affected are 1.8-liter ...