Too bad it's not an S2000 ad. It's for the Cadillac CTS. It as Led Zeppelin as the background music and shows a silver car going around the track one way, and 5 black cars going the other, and they meet on a straight away. The track is surrounded by perfect green grass (so it must have been shot in early spring, it was dead brown in June). I thought that it looked familiar. I finally caught it on tape during an F1 race, so I watched it in slo-mo. There is an overhead shot of turns 1 through 6 that clearly shows that it is Thunderhill.

 

One of the earlier Mazda Miata commercials were taped at Thunderhill as well. It is a real nice track.

 

http://www.cadillac.com/cadillacjsp/models...eos_MOV004.html

I thought the track looked familiar!

 

What? They're bypassing the Cyclone? What's up with that?