Not trying to start an arguement or anything but,
FACT,
just because the tyre's sidewall says you can inflat your tyre to a max psi of 40psi doesn't mean you should.
FACT,
factory recommends you inflat 205/55/r16 tyres to 2.2kg/cm(2) which equilates to 30 odd psi. In my case 32 psi is a healthy dose.
FACT,
my car is a daily cruiser, I'm in the current phase where I prefer comfort over performance.
FACT,
considering the guy who works at Firestone has a GT-t Skyline himself, shows he at least is not a complete idiot