I agree that proper cylinder wall prep is the single most important factor. By proper I mean that besides the obvious ie. perfectly round with no taper that the finish should be appropriate for the type of rings used. Most modern moly filled rings like a pretty smooth finish. Excessive oiling of the rings and/or too gentile a break in can cause glazing and excessive oil consumption. Putting the engine under a brief load in the higher gears and then letting off the gas quickly can help seat the rings. Sometimes the use of a non-detergent oil for the first 100 miles or so can help with rings that are slow to seat. Regarding compression and oil consumption, I have seen engines with good leak down and compression #s that used oil. I've also seen just the opposite, very little oil consumption, but poor test results. Good luck.