Thanks for the advice Kristian. I have my tire pressures at 39 psi right now. Max sidewall is 44, but I'm just not brave enough to go higher right now. On a plkus though, at least the sidewalls are off the ground more than they were at 32psi.
Right now there isn't much hot air around here. Max outside temps are around 60F, and usually between 40-50F in the mornings.
I don't think I have TSB-058. But it depends on when it came out. I got my Civic used, so I don't know if it was installed or not. Likely the first owner and the dealer wouldn't have updated the computer unless there was a problem, and there is no evidence of any dealer work other than regular maintenance, and a TSB installed in 2008.
I read that Super-Mode for 70-90MPG is not available over 60 MPH? Have you heard about that? I also don't have a Scanguage II. So maybe it would be nearly impossible to achieve those MPG results without one to monitor temps and such.