To those forum members that would do such a thing. I'd like to say that I've been a 6-mo/5,000 mile guy for quite a while, and was using M1 EP during those days. Dave at HPL convinced me that by using his oil, even just the regular PCMO, I could very comfortably double that interval, and he mentioned some situations in which the oil has proven itself. Based on what Dave has put forth, unless you're vehicle is used for the most extreme and severe situations (which, frankly, I cannot imagine), extending the drain interval should be a no-brainer.
You don't need 5,000 mile OCIs, you already bought the insurance by choosing HPL, and compared to so many other oils, it ain't cheap.