NASCAR schedules tests for 2013 cars – fans can watch – TODAY:

Cup teams will have the 2013 model for an Aug. 7-8 test at Martinsville Speedway that is aimed at rules tweaks to make the cars lighter and help Goodyear develop tires with more grip to improve racing. The 2013 car also will be tested Oct. 4 at Talladega Superspeedway, Oct. 9-10 at Texas Motor Speedway and Oct. 18 at Kansas Speedway. Dodge is taking part in the tests. The manufacturer hasn ‘t announced any replacements for Penske Racing, which will join Ford next year.(USA Today)(8-1-2012)
UPDATE: Martinsville Speedway’s grandstands will be open to fans free-of-charge for an August 7 and 8 NASCAR Sprint Cup Goodyear tire test at the historic half-mile oval. The test will feature the new 2013 Sprint Cup cars. The test session will run from 9 a.m. to 5 p.m. each day, with an hour break at noon. Gates will open at 8 a.m. each of the two days and will remain open until 5 p.m. Restrooms will be open both days, but concession stands will not be operating. Fans may bring refreshments into the grandstands.(Martinsville Speedway)(8-4/7-2012)