Fellas, this article is why you do not want 30 micron contamination rolling around your engine, and if you see the test above, the Royal Purple filters assures you will not have 30 micron particles in your engine.
Society Of Automotive Engineers (SAE)
Paper Number 881825 Entitled
"Correlating Lube Oil Filtration Efficiencies
With Engine Wear"
Written by David R. Staley of General Motors Corp.
This is the conclusion of this study
The researchers drew the following conclusions:
Abrasive Engine wear can be substantially reduced with an increase in single pass efficiency. Compared to a 40-Micron filter, Gasoline Engine wear was reduced by 50 percent with 30-Micron filtration. Likewise, wear was reduced by 70 percent with 15-Micron filtration. Controlling the abrasive contaminants in the range of 2 to 22 Microns in the lube oil is necessary for controlling Engine wear.
So I feel like you guys have all of the info, if you want to use paper filters after everything I posted, that is on you. We don't have a 15 micron test, but it could only be worse news across the board of the 30 micron test. And the thing the test doesn't spell out but I feel it should, is that spun microglass lasts your entire oil change interval, paper fails and when it does you can fit anything this side of a marble through it. Bypass is worth a look, but you need to find one that is synthetic or it defeats the purpose in the first place.
do your own research, look at white papers on critical particle size for engine wear.