I have a 2012 PTT I have run various pressure options from the manual. I have settled in on the higher pressure (44/44 - cold) on my car. That is with 20" wheels and Michelin summer tires. Runs 48/48 hot.

I drive a lot of miles daily (140 or so M-F) and found those pressures, while giving a slightly harder ride, deliver an extra mpg in fuel economy and my tire wear is good. So overall for my DD needs that seems to be a good mix.