Well, this is my first attempt at recording SHM(youtube made it look worse!). You will notice that I start to fall off of 50mph at about 1min and after that I start a small incline on a bridge which is when I realize that I have gotten too far below 50mph. The road is bumpy and crappy which causes the camera to shake(my high psig doesn't help

). There is definitely a lot going on with trying to hold the camera still, maintain speed, watch LOD and make sure I stay in my lane. I think what you can take away from this is that SHM does exist but it is hard to maintain for a while. LOD at 46 seems to be the magic number or at least it sticks out too me.
Paul, I didn't realize that reseting the trip would reset my "aFE" which is my average fuel efficieny for current trip. My SGII came preprogrammed.
I may attempt this tomorrow morning if I am feeling lucky. I tried like 8 times and this is the only video worth a crap

:
http://www.youtube.com/watch?v=lFNwRBLCCV4