Lakedude, no doubt your techniques are important, and your results prove that.

but even the best hypermile driver in the WORLD cannot outdrive the Laws of Physics...and the increased friction of a new engine and the added resistance of lower inflated tires WILL take a toll on MPG.

Per your example, maybe with a broken-in engine and 40-45 PSI, your first tank might have been 63 or 64 versus 61.....