I have now added my previous data to the EM garage. The last 7 or so fills are with the SGII. I've seen about a 2-3 MPG increase with minor changes.
It is a slight progress, but progress nonetheless.
Not great numbers, but I love my CL too much to get rid of it. (But if I could find a 4 cylinder manual to replace my 6 cylinder auto it may be a win-win
)
Footnote: I have made this change while out of school, which is when I typically get my WORST mileage. Can't wait to see what happens when I get back to the grind in a couple weeks.