I have had to take mine out on the Interstate alot lately because of the plant I am working at for the next month and a half. I have to keep reminding myself to slow down when going on the on ramp to I-85 in Charlotte. I put it in 4th and floor it. It is so smooth to over 100 mph that I have to ease out of it. My 70 would really let you know when you get over 100. Buit this new R/T is so smooth you have to watch your speed. I use cruise control alot.