Since no one has bitten I'll take a stab. I've not used it, but I've read a lot of info on it, and I'm guessing it has a ton of zinc, which isn't surprising. Lot's of anecdotal evidence that it quiets noisy engines, which points to zinc content.
Most of our OPE would run fine on almost any oil and do just fine, I just don't think there's a compelling reason to use K oil over say, Rotella, Delo, or SuperTech.
