I am planning to open it up on a stretch of highway attempting to hit 168mph at top end. My thought is to go early a.m on a Sunday, check for po po and turn around at have at it. I've never taken it over 90 and really don't know what to expect at higher speeds. Is there any preparation (other than mental) that I need to consider, i.e. should I use auto or paddles?; sport mode? tires? Have any of you guys taken yours to top speed on highway? If so, what speed did you hit? Thanks.