Well, with cruise control locked at 74 (in a 70 MPH zone) and EFILive chugging bytes, and even though it was only 40 degrees out, I decided to test the new MPG PID, on something that has interested me for 20 years or so.
Windows down, Camaro was getting an average of 23 MPG.
Windows up, about 25 MPG.
Now I didn't turn the air (crazy, yes, insane, no), but will look into this next time it's over 50F or so... and over 60, the T-Tops come out!
Just a FYI.
Thanks all!