Quote Originally Posted by aj_92rs
The tire pressure on the sidewall of tires give the max. load rating at max air pressure. It is not the recommended tire pressure for all around use.

The car companies work in conjunction with the tire manufactures to come up with an ideal pressure and post it in the door jamb on a sticker.
You sir are 110% right. What the manufacturer says on the door jam is the best tire pressure for a normally loaded vehicle. It's the best compromise between thread wear, comfort and fuel economy. In the long run it'll end up costing you less(not just tires, but everything connected to them) if you run at the recommended inflation.

Running more air in your tires will decrease ride comfort and tire life significantly. Overinflated tires wear the middle part of the threads faster than the outside, ending in premature tire replacements. I suggest you talk to a specialist before inflating your tires to other specs than specified by the manufacturer.