Vaughn,
I respect your posts, but I've ran Rotella 18,000+ miles, 100% towing, no filter changes and have never had Iron readings that high. Similar with Copper and some others.
Blackstone has done my samples since 100,000 something, and I'm now at 300,000.
The only thing I haven't set an example for is CJ-4, and I'm curious. The last 2 fills were CJ-4 and I wanted a sample on this dump, but I'm out of sample bottles and my truck is having Flux1's installed.
Forgot to add: I idle my truck 4-5-6, sometimes 8 hours with no fuel in the sample either.
Add this too: I run NAPA Gold filters as well.