See also:

Outside the United States and Canada
Government regulations in the United States and Canada require that automobiles meet specific emission regulations and safety standards. Therefore, vehicles built for use in the United States, i ...

Performance
When the Mazda6 debuted last year, I drove a powerful V-6 version called the ''s.'' That car handled like a true sport sedan, with relatively heavy steering and a pretty rough ride. It was fun, bu ...

Fuel Requirements
* U.S. federal law requires that octane ratings be posted on gasoline station pumps. Vehicles with catalytic converters or oxygen sensors must use ONLY UNLEADED FUEL, which will reduce exhaust ...