I think it is in a high-stress emergency maneuver that you will want the tires to not fail.
You won't know you have over-inflated them to a dangerous level until it's too late.
I would not go over the sidewall max at cold.

Good luck.
Take your time.
Read a lot here.

You'll get there.
I've had 3 years of practice (I drove a 2004 HCH before this 2006) and I'm still improving.

Look in the database here.
Everyone starts with lower MPG and improves over time.
We think it is part the car breaking in and part the driver gaining experience.

Need fewer troops to support.
Drive a hybrid.
Best tank 71.65 MPG.

Before this car I spent two years learning hypermiling on my 2004 HCH1.