NASCAR driver Tony Stewart exits pit road into turn one as he and other drivers perform a Goodyear tire test in vehicles that include the new spoiler package at Texas Motor Speedway, Tuesday, Jan. 19, 2010, in Fort Worth, Texas. The stock cars had been utilizing a wing-like design on the rear deck lid since 2007. The new spoiler was the design used prior to the 2007 design introduction.

NASCAR driver Tony Stewart exits pit road into turn one as he an… (AP Photo/Tony Gutierrez)

NASCAR driver Tony Stewart heads down the front straight-away as he and other drivers perform a Goodyear tire test in Sprint Cup Series stock cars that include the new spoiler package at Texas Motor Speedway, Tuesday, Jan. 19, 2010, in Fort Worth, Texas. The stock cars had been utilizing a wing-like design on the rear deck lid since 2007. The new spoiler was the design used prior to the 2007 design introduction.

NASCAR driver Tony Stewart heads down the front straight-away as… (AP Photo/Tony Gutierrez)

Stewart-Haas Racing team members, from left, crew chief Tony Gibson, driver Ryan Newman, driver and co-owner Tony Stewart, crew chief Darian Grubb, and director of competition Bobby Hutchens are shown during a stop in the NASCAR Media Tour in Concord, N.C., Monday, Jan. 18, 2010.

Stewart-Haas Racing team members, from left, crew chief Tony Gib… (AP Photo/Mike McCarn)

Darian Grubb, crew chief for Tony Stewart, talks with reporters during a stop in the NASCAR Media Tour in Concord, N.C., Monday, Jan. 18, 2010.

Darian Grubb, crew chief for Tony Stewart, talks with reporters … (AP Photo/Mike McCarn)

Stewart-Haas Racing co-owner and driver Tony Stewart listens to questions from the media during a stop in the NASCAR Media Tour in Concord, N.C., Monday, Jan. 18, 2010.

Stewart-Haas Racing co-owner and driver Tony Stewart listens to … (AP Photo/Mike McCarn)

Tony Stewart, right, listens as Ryan Newman answers questions during a stop in the NASCAR Media Tour in Concord, N.C., Monday, Jan. 18, 2010. Stewart and Newman drive for Stewart-Haas Racing; Stewart is an owner of the team.

Tony Stewart, right, listens as Ryan Newman answers questions du… (AP Photo/Mike McCarn)

Ryan Newman, left, and Tony Stewart joke with each other during a stop in the NASCAR Media Tour in Concord, N.C., Monday, Jan. 18, 2010. Both drive for Stewart-Haas Racing, of which Stewart is an owner.

Ryan Newman, left, and Tony Stewart joke with each other during … (AP Photo/Mike McCarn)

Tony Stewart, an owner for and driver with Stewart-Haas Racing, listens to questions from the media during a stop in the NASCAR Media Tour in Concord, N.C., Monday, Jan. 18, 2010.

Tony Stewart, an owner for and driver with Stewart-Haas Racing, … (AP Photo/Mike McCarn)

CONCORD, NC – JANUARY 18: Tony Stewart, driver of the #14 Old Spice/Office Depot Chevrolet speaks with the media during the NASCAR Sprint Media Tour hosted by Charlotte Motor Speedway and held at the Embassy Suites on January 18, 2010 in Concord, North Carolina. (Photo by Jason Smith/Getty Images)

CONCORD, NC – JANUARY 18: Tony Stewart, driver of the #14 Old S… Getty Images

CONCORD, NC – JANUARY 18: Tony Stewart, driver of the #14 Old Spice/Office Depot Chevrolet speaks during the NASCAR Sprint Media Tour hosted by Charlotte Motor Speedway and held at the Embassy Suites on January 18, 2010 in Concord, North Carolina. (Photo by Jason Smith/Getty Images)

CONCORD, NC – JANUARY 18: Tony Stewart, driver of the #14 Old S… Getty Images