I feel even after presenting valid evidence the witch hunt still goes on with the Amsoil fanboys against all non-Amsoil products. While Amsoil sounds good on paper and has good marketing schemes it does not measure up in real world environments.
Let me say this again and many others have said this before as well:
I use a filter to filter OUT the particles and not have them keep floating around in the oil.
If at 5000miles Amsoil has all this extra particles floating around I wonder what kind of sandpaper action would have taken place after another 20,000miles.
Change often, filter well, keep stuff clean OR Change 25k, filter less, keep stuff "economical" and "hassle-free" (not as frequent oil change). Choice is up to you.