We go thru the same education over and over dont we!?
When it gets cold,, #2 will gel!!! You should be buying fuel from a source that winterizes the fuel by mixing it with #1.
Every fuel fillup should also receive a shot of Power Service. . Without fail!!!
Every fall should find a new fuel filter in the system.
A fuel filter should never "look dirty", if it does you must have pretty dirty fuel. Id get another source.
Never use Heat or those other alcohol additives. I cant remember why but I know you should not.
If your diesel stops running,, and wont restart bite the bullet and get the frostbite out of it. Get it to a warm garage or like some others have said use a salamander to get the rig warmed up.
If you can get the engine to idle,, quickabunny find some Power Service and get it in the tank. It cannot do any good unless it can circulate thru the system.
Sometimes it is not a gel problem but a slug of water (ice) in a low spot feeding the engine.
There is no excuse for this problem,, these engines run in the Arctic all the time!!!
There are other additives but I am a Power Service user and have had absolutely no problems with it.
This problem is easily avoided with prep for winter,, having said that Ive been bitten also along those cold gravel Iowa roads taking the kids to BB practice at 0600,, gits scarey dont it!!!