Well, I just got 4th place in a Lexus Wedsport IS350, which you can buy in the Lexus dealership.
The race took a little under of 6 1/2 hours. But man, such a good race in this car. The fastest car had about 150hp more than I. I was running 9 lap stints while the leader was running about 13-15 lap stints, which made it really difficult. But, I was fueling the car just enough to complete each stint and I was always within striking distance (sometimes 4 seconds behind).
Around lap 140, since I had forgotten to plug my controller back into the ps3 I ran straight into the wall as my controller ran out of juice. As I frantically searched for my USB cable I lost over a minute which lost me the race. But, I'm going to do it again in this car and see if I can't win because the race was just so close and fun in this car.