Maximum tire pressure. Who to believe?

Never been a problem.

Just what additional info is in the owners manual that we are not privy too?

Nothing. It refers me back to the pillar sticker.

::Note to self Check dates. Sometimes CarTalk moves old threads forward so they seem like new ones::

The manufacturer’s ratings are from testing of ride quality, traction, handling, and fuel economy. Probably especially fuel economy these days, but in 2004 on your ‘sporty’ vehicle it was likely more about the handling.

I would just follow the manufacturers recommendation on the door plate. If you’re worried about inflating to max pressure, drop the pressure a couple of pounds. Your mileage will probably suffer a little but likely nothing else. It may end up riding slightly better.