Doesn't take a competitor of Motorkote to analyze it. You send it in. Send me a sample and I'll send it in. I send in my used oil after changes to keep tabs on the motor. Costs $25 from Blackstone and anyone can do it. There's a number of labs to send in samples to.
No doubt every company has proprietary information they won't release to the public. Anyone know KFCs secret recipe?
I don't use an "oil additive". I just run the oil spec'd for my engine @ the recommended maintenance intervals. If the engine goes south at least have a leg to stand on when we're looking at repair options with Cummins. I'm generally skeptical of claims like the one in the OP. They're just not for me. I'd prefer to run the course on par than gamble money and hope for returns.