Sorry for bumping this thread, but I too have this problem. I just bought the SRT6 last night and didn't notice the problem until today when I drove it a little longer...Thank god for this forum, it will be a huge help in explaining and diagnosing the problem! The car has 35k on it and I notice the "sluggish" feel once the car gets up to temp. So I guess its back to the dealer already...Hopefully they wont give me any problems.