Original: Schumacher's retirement at the end of  made Barrichello the most experienced driver on the grid, and at the 2008 Turkish Grand Prix he became the most experienced driver in F1 history.
Simplified: Schumacher's retirement at the end of 2006 made Barrichello the most experienced active driver. At the 2008 Turkish Grand Prix, he became the most experienced driver in F1 history.