Try to take advertised test's with a grain of salt. The oils you have mentioned have been around for a while, have been certified to meet certain specifications by those who abuse engines in ways that just about any motorist wouldn't likely dish out.
Look at the UOA's on all the different types of oils, weights and engines, as well as service conditions and total miles. Perhaps some metal particulates from cylinder and ring wear does leave via exhaust discharge rather than getting mixed in with the engine oil.
Some around here are experimenting with adding products like MMO, bio-diesel or some 2-cycle oil to the fuel for upper cylinder lubrication, though added polution may result even with possible trade-offs from improved MPG potential, along with concerns over emissions equipment lifespan.
A lot of the graphs referencing advertised products seem a bit skewed in how they are presented, saying their x,y and/or z axies are not of equal increment value, but rather start at 0, and then jump to a large value, and then rise in a much smaller set value the rest of the way. This can make small differences appear big to the quick observer.
It's unfortunate that marketing and advertising presents such data in ways that are strictly meant to "catch the attention" of observers, to the extent of misrepresentation and applied charactor meaning that using a product may thus make one officially a part of...or not. I feel it's best to use a product because it suits one's needs, though I too have found myself ensnarled and concerned. How realistic are one's expectations? - this is another marketed target. I digress.
