I've been running PS in my CTD and my PS 7.3 for about 5 years now. Works like a champ. The silver bottle gets me about a mile per gallon, but it's not the cetane boost I'm looking for. The injectors are clean. That improves spray.

 

I have been using it every tank since truck was new.

 

I'm using it in my truck, but haven't owned the truck long enough to know if it helps or not. Doesn't mean I'll stop running it though.