The CVT is tricky. IMHO, I wouldn't EOC or that sort of thing. Just keep a light throttle to keep those revs low.
The Cal isn't as aerodynamic as the Neon, so anything over 60 is more and more money flying out of the tailpipe. It's your quest for FE -- so if 80 is where you want to be, it's your prerogative to stay there.
Ask yourself if you really want to save the fuel and if slowing below 80 is an option. Try it in 2-3 MPH increments. You'll still get passed doing 80 or 60, or probably even 90. Make the changes in small increments if you honestly want results.
I went through the same thought processes. It took me a couple of years to get comfortable with it. I learned quickly that amazing results can come from just slowing down. I just let people pass and stay out of the way. Life is good in the "slow lane".
RH77