I use AR9100 in every oil change (Rotella T6 5w-40). My truck used to stumble all over itself until everything was up to temp. My injectors were in **** shape.
Now I can fire the truck up, let it idle for a moment while I situate everything, and it drives down the road without so much as a hiccup.
I have my oil inspected by Blackstone after every change. After I started using the additive they noted the increase in Boron, Potassium, and Sodium.
I thought it was all snake oil but I got a free sample from Mr. Bill Hew.....some guy online....and it made a believer out of me.