Coca-Cola

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Jimmie Johnson talks to a crew member before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Terry Renna)

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Greg Biffle waits by his car before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Mike McCarn)

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Austin Dillon prepares before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Mike McCarn)

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Brian Vickers climbs into his car before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Mike McCarn)

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Kevin Harvick talks to a crew member before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Terry Renna)

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Matt Kenseth waits in his car before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Terry Renna)

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Brad Keselowski, center, signs autographs before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Mike McCarn)

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Jeff Gordon talks to crew members before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Terry Renna)

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Kyle Bushc, left, talks with Dale Earnhardt Jr, right, before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Mike McCarn)

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Jimmie Johnson prepares before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Mike McCarn)