Is there anything like stay-bil for diesels? any special diesel winter storage things?
Mark

I'd go to your local gas station and pick up some Power Service Diesel Kleen, Howes Power Kleaner, Diesel 911, or something like that. ($5-10) The flipside of the bottle will tell you the amount of their product you need for X gallons of fuel. If you're going to store a vehicle over the winter make sure the tank is full of diesel so the condensation factor will be kept to a minimum.

Should be good to go come spring time.

Danoflapper said:

Any of the products with "Clean" in them are for removing bacterial/fungal growth in the fuel system. They do nothing for preventing a fuel tank slushy.

Diesel 911 is for emergency gelling stoppage and reversal.

Being you're in bio diesel country, you're going to want to use a bio-diesel cleaning agent (essentially a fungicide/herbicide) to kill off any microbial growth already present, and prevent further growth during storage.

Dump that in, and let it do it's job.

Now, about winter storage....if there is one, pull the drain plug on the bottom of the fuel tank and let a few quarts come out....this will allow any water that is present to drain out (water is heavier than fuel, so the water settles to the bottom).

Now, add your preferred flavor of anti-gel additive to the fuel, and if you have purchased any diesel with bio blends, be sure that the additive clearly states that it works with bio, or you'll have solids in the tank.

Change the fuel filter before storage-water settles into the bottom of fuel filters, and can cause corrosion in them, and when you fire them up in the spring, that rust flows into the injectors-bad.

I've never really experienced diesel fuel going "bad" like gasoline does, but Power Service claims their "Agri Power" product stabilizes diesel fuel during long term storage. IDK, never used it.

http://www.powerservice.com/ap/

I store diesel fuel every year. If you are using the fuel as well as storing it I would get #2 diesel and put a double dose of anti gel like powerservice in it. It will give you better mileage than diesel that is mixed with #1 diesel like most winter blend diesel is and with the double dose it will not gel even at -25 deg.
If you are storing it and not going to use it till spring you do not need anything in the fuel. Just fill the tank so as little moisture condenses in it as possible. It will stay for well over a year like this. If you are going to store it for multiple years then you need to put a storage additive in it. Powerservice makes this product as well as others. It can be hard to find sometimes as it is not used by a lot of people since diesel will keep much better than gasoline. If you have bio-diesel in your fuel it will need other care.
I keep my 550 gal. tank on a slight incline and have a ball valve on that end so that in the spring I open the valve and drain off any water that has accumulated in the fuel.
If you are in the south where the weather stays mild you will want to add an antimicrobial additive to the fuel for long time storage.
If you have older diesels or even new ones for that matter you might want to add some 2 stroke oil to the fuel at about 400/1 so that your fuel systems last longer on your diesels. If you use bio blended fuel you do not need the 2t oil. I use the marine 2t oil that you can get by the galon for under $10 at wallyworld or Farm&Fleet. I use the cheapest TC3 oil I can find.