I had been wondering about this diamond lube, so, I bought the ~$20 little vile.
I thought I will give it a try on a few things around the house. So far I can say it works better & longer than dry spray Teflon lube on door hinges, knifes & my tripod. This is by no means a car engine but as of now this is my favorite lube. It really is amazing the how little is needed & how slippery it is.
Once I get a few things in order I plan to test this on a small gas engine before testing it on my daily commuter.
I tested motor silk several years back with similar claims & was unimpressed.
Boron CLS Bond