Thanks PRV, this is what I thought. The reason I asked is that I actually own the LC500 (sport/performance package) and have brought it to a couple of track events. However, when I run it in Sport+ mode, the engine oil heats up fast within 2 minutes (not coolant though) to the redline in about 6 minutes and I get an error message that the transmission fluid is overheated. Of course I stop right away, or if I turn it to normal mode before it gets too high, then it returns to normal and I can run it on the track in normal with no problem. I asked about the RC F because both share the same engine. However, the RC F is built for the track and has numerous other features that appear to keep the oil heat low. In any event, I know the LC500 is not a F car or not made for the track, but I took it there because I wanted to drive it fast and see what it will do. It's a fabulous Grant Touring sports coupe, but not a Performance car (as some Lexus ads suggest). Anyway, I've tried to get Lexus to comment and they won't say anything. But I'm sure it has something to do with the venting design as well as some key features of the transmission. The new 10 speed transmission in its current form will not do well on a track in Sport+ mode. I suspect that it will in the LC F. In the meantime, I've developed a love for track driving and bought a Porsche 911 Carrera S, a car (2 weeks ago) that does extremely well on a track. I was reticent about getting an RC F, but now with your comments I can see that it is really built for the track. thanks again and enjoy your RC F on the track! PeterF