Motorsports this weekend

North American TV coverage shown after each entry, see tvracer.com for details. All times ET.
Formula 1: The longest F1 season ever wraps up this weekend in Shanghai. The Chinese Grand Prix will be the last appearance for three independent teams, Sauber, Minardi, and Jordan. It also marks the end of the unsuccessful BMW-Williams partnership. Things to look for in the race include the battle for the Constructor's Championship (Renault leads McLaren-Mercedes by only 2 points), and the performance of Takuma Sato's special Honda V10, rumored to make nearly 1,000 hp and over 19,000 rpm. (SPEED Channel, 1:30 am Sunday)

NASCAR: The fifth race in the Chase for the Nextel Cup is at Lowe's Motor Speedway this Saturday night. Tony Stewart continues to lead the Championship points. Elliot Sadler put his Ford on the pole with a track record 193+ mph. (NBC, 7pm Saturday)

More after the jump…

American Le Mans Series/SPEED World Challenge: The ALMS and SWC seasons wrap up this weekend at Mazda Raceway Laguna Seca, one of the toughest permanent road courses in the U.S. The ALMS race will see the debut of the new Porsche prototype. (SPEED Channel, ALMS - 1pm Sunday, SWC - 5pm)

MotoGP: The MotoGP tour stops at Phillip Island this weekend for the Australian GP. Practice crashes have already eliminated Kenny Roberts and Loris Capirossi. Valentino Rossi is quickest so far, with American Nicky Hayden third quick in practice.
(SPEED Channel 11am Sunday)

Indy Racing League: The IRL wraps up its season at California Speedway this weekend. This will be the last appearance by the IRL at the oval. Its only race in California in 2006 will be at the Infineon road course.
(ESPN 3:30pm Sunday)