Pressure is not as important to me, as tread contact with the road for even tyre wear, thus I use a chalk method to adjust TP
I run several lines of sidewalk chalk across the entire tread, outter lugs to outter lug. I drive a few short feet and see if it wears off evenly or just in the middle meaning tyre is inflated to hi!
Once I get my tyres to all run at same level of chalk wear, I read the TP and then run that....if I carry a heavy load, then I adjust upwards accordingly...
You will be surprised at how much a tyre does NOT run true and flat on the ground when inflated at 55+ lbs...
THIS WORKS FOR ME....it may produce different results for you....
If I want SUPER mileage I'd max TP to sidewall rating! BUT I take good contact over the minimal difference that max TP would make on mileage as TYRES are expensive to wear out due to improper inflation!
JM2CW
Al