I'm not at all going to disparage your first hand experience, but I've seen test on Bob the Oil guy's site that confirm many of the SuperTech oils test out almost on par with the name brand stuff. Keep in mind, many name brand oils are low in ZDDP anymore. My old classic Porsche's require a oil with high ZDDP and the forums for those cars have lots of info about what to use, and what not to use.Fair warning: Supertech oils have no (or terribly insufficient amounts!) ZDDP additive in them. If you put that cheap oil (conventional or syn) in a motor that has a flat tappet camshaft you'll destroy the cam & lifters in very short order! I guarantee ya that! And its deserved!
I've seen plenty of those glittering results flowing out into my drain pans here. I see the long metal shards galled from cams & lifters thickly clustered on magnetic drain plugs too. The farmers around here are all ignorant tightwads... they neglect everything until its broken down then cobble it up, rarely they will change oil & filter in anything and they all buy walmart Supertech oil when ever they do! Yet they moan and complain constantly that their vehicles and equipment don't last very long. I think they all might be genetically related somehow.
Most of the high end 20w-50's are high in it, as that's what was used in many of those older German cars. And they need ZDDP or your in trouble. I use Mobile 1 20w-50 just for that reason.
However, with SuperTech it all depends on where you live. I work for home office and was chatting with one of the guys who's over oil, and at that time (4 years ago) there were 3 different companies making ST for Wal-mart. What you got depended on location, and that was due to some legal reasons I can't go into. For a large part of the country the stuff you got was exactly the same stuff as was in a name brand bottle everyone knows and trust.
I've also read most of the "house brand" oils are in the same boat. They are the same stuff you get with one name brand or the other, with a different name slapped on. HOWEVER, I've also read on Bob the Oil guy that the stuff to really stay away from is convenience store chain brands. Or like Dollar General oil. Those test like very old oil, like you used to get 30 years ago.
Any new vehicle I get, from bikes to ATV's to lawnmowers, I research the heck out of it's oil requirements. Then I research who has the certs and additives it needs. No matter what brand you use, if you use the wrong KIND of oil, your going to cause issues.
That's my .02 cents. For what it's worth, I'm very happy with my Rotella diesel oil so far. My new clutches seems to play very nice with it.