This video is made to help explain where and how to find the proper specifications for your tire pressures.

Of course you can go up or down in pressure as you so with but use the sticker as a guideline.
Higher pressures will give firmer ride and better fuel economy but increased tire wear in the center of the tread.
Lower pressures give softer ride but more outside edge wear and less fuel economy.

In my 20+ years experience I have had NO issues following the tire loading placard (sticker) as a good reference to filling the tires. Issues meaning safety. If the car/truck gets overloaded you will see increased tire wear and you will know that its time to up the pressures.

There IS NO MAGIC NUMBER since the pressures will vary due to temperature. It will never be consistent.

Thanks for viewing!
Lou