I don't understand how you possibly arrive at 750,000 miles based on $10 dollars for the cheapest filter. If you are changing you oil every 5,000 miles, you will need 15 oil changes to equal the cost of the TruFilter ($10x15=$150). If it took 150 throw away filters to pay for the TruFilter, it would retail for $1,500. You are off by an order of magnitude.
So at $10 dollars per filter, and 5,000 mile intervals, the filter pays for itself in 75,000 miles.... not 750,000 miles.
It seems like the more I try to find out about filtering efficiency of ANY filter, not just SS media, the less I know. I've found seemingly reputable sources praising SS filters (Numerous hot rod and motorcycle mags) and others trashing them. Nobody, however, provides solid data that I can find. Also, it seems that different filters use different testing standards, so it is really hard to know what you are comparing. I'm waiting for a call back at the moment from the tech departments of both TruFilter and Pure Power. I'll get to the bottom of all this eventually, but it is taking some serious legwork.