[wdb]

Pay no attention whatsoever to the instantaneous mileage numbers. They're not worth much except in comparison to themselves. Use LOD (which didn't work for me, it was always maxing out) or horsepower (which did) or TPS (which also did).

I tried P&G, and I tried calibration, and in the end I gave up on the SG. I decided to keep it so I have something to clear codes with, but the rest of the time it will sit in a box on a shelf.

The bottom line is that the slower you go, and the more you coast, the better your mpg will be. P&G helps incrementally, but adds effort -- and, significantly in some cases, risk. Same with FAS. Pump up your tires to the maximum level you find comfortable (45 psi here), slow down, coast when practical and safe to do so, and otherwise just drive your car.