Maybe they should change the name to "Busch-tol" Motor Speedway, as Kyle Busch sweeps the weekend races at Thunder Valley.  Kyle Busch, driver of the #18 M&M's Toyota, celebrated in Victory Lane after winning the NASCAR Sprint Cup Series Jeff Byrd 500 Presented By Food City at Bristol Motor Speedway on Sunday.   Busch has won the last 5 Sprint Cup Races at Bristol, he also won the Nationwide Series "Scott's EZ Seed 300" on Saturday.