Jesus man. Cant you search or look anything up? If you know of 911, you should know what its intended usage is. Not being a dick but doing a little investigation for yourself is how you'll learn.
Now on to being constructive. Go into the aisle in your local farm n fleet, rural king, tractor supply, big r, or truck stop and start grabbing bottles and reading what they do. I believe diesel kleen disperses water as does power services brand "white"(the bottle color). Stanadyne, redline, and many other companies make additives that will mitigate moisture in your diesel fuel and many other things including raising cetane numbers. Most stations cetane numbers are horribly low and that affects you r bottom line. Unfortunately, you'd have to spend money on additive to restore tue cetane values. Its.basically a case of you aren't getting what you pay for. Its a joke. Especially considering diesel fuels cost in juxtaposition to gasoline.
My dad has been super trucking for 55 years and he swears by Howe's diesel additive but he runs A LOT of biodiesel. In the height of summer he's running b100. Personally, in your shoes, Id dump a bottle of seafoam in the fuel bowl and one in the tank and let it clean your fuel.
