Trinick pls (gtho nick)
As for me, I'm a goody goody who usually follows posted speed limits. Almost every road where I live has posted speeds of 60, so I have the engine sounds pre-synchronized in my brain so even when I'm not thinking about speed, my brain works as a cruise control and I always end up going 60 on highways.
Highest for me was 81mph in 70 (I-55). I was driving our '13 Ford E-350 XLT (looks exactly like picture):

The first time I ever drove on public streets, I went 72 in a 65 driving a '12 Ford Focus.