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Nissan simplifies tire inflation with its new warning system

Nissan will install tire-pressure-measuring systems on its Quest and Altima vehicles that alert the driver filling the tire when it reaches an acceptable level. Most people don't carry a tire-pressure gauge in their car. A new federal study shows that underinflated tires triple the risk of an accident.

Americans plan to keep their cars longer, AutoPacific study finds

In another chilling sign that auto sales are likely to remain stalled, a new study finds that Americans intend to keep their cars longer, indicating a general concern about the industry and the overall economy. The number of new-car buyers planning to keep their rides more than four years has risen to 59 percent, according to a study released Tuesday by California marketing research firm AutoPacific. That's an increase from last year, when about 45 percent of new buyers intended to wait more than four years for their next purchase, and it's up from 2005's tally of 46 percent.

Jay Leno drives the Chevy Camaro Z/28

Jay Leno took one of the first non-GM-employee drives of the new Chevy Camaro Z/28 on his “Jay Leno's Garage” web series this week. He talked with chief engineer Al Oppenheiser at his warehouse about what it took to add the famous name to the proud pony car. We first saw the new Camaro at the New York auto show in March.