Ok, put the pressure back to door jamb levels. Recalculated old and new data. Looks like I may have made an error in the numbers. Getting same mpg for both pressures. So forget it, the lower pressures have no effect after all.
The brakes are still crappy though.
The gas from that one Shell station is better MPG than others (maybe the pump calibration is off, but by how far, really?).
And...........higher than recommended pressures, that isn't cause for possible blowout (e.g. keeping the tire edge in the rim flang)? Yea, it is.
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