I have found that most cars tend to have a "natural cruising speed" -- the speed where they seem to want to cruise most of the time if the road is good, etc. The interesting thing for me is that my Crossifire's cruising speed seems to be going up as I do mod's -- for example, the most recent (larger MAF) has now found me cruising at 85mph instead of 80 on the same roads (the 101 on the north side of Scottsdale). The RS4 wants to do 75, and the 2003 M5 likes 80.

Anyone else have similar experiences?