Well if nothing else, early indications are good. My experience has been that spark plugs will show you something right away or they wont. Ive never tried a set that once put in, failed to show improvement until days or weeks later. You usually know right away.
That said, I agree that over time comparison will be the ultimate story. But so far you are talking about a 10 - 15% increase, which I picked up nearly that much by switching the car over completely to synthetic lubricants. Keep us posted, good information so far.
