I have 2k miles on my IS F now, and I am beginning to notice when I really get on it hard, I am not getting all the power to the road. It's not that I loose control of the car by any means, but I notice its not sticking to the road like it did before. Is this just due to the tires having some miles on them? I live in Texas so I don't think its a temperature thing (still 75 here). It's not a big deal, but noticeable enough to ask the crew.