The odds of fuel gelling is really quite low. Unless you are at the bottom of Mt. Washington in the Summer (100 degrees) and only 20 at top.
Usually in the Northeast they switch over VERY soon in Oct and never had a problem. [censored] never heard of people having problems unless they leave fuel in there in July and never use it till December. If you do not use it for that long you will need to do the proper techniques for storage. If you are traveling from one climate to another you will run out the old fuel WAY before you get gelling. The changes are slim to zero.
If you have water in fuel it means you are being junk fuel. Never had bad fuel since the early 90’s. Never in my truck nor tractors had a water/fuel problem. Again, buy fuel at places that “move it”. Not at a local mom and pop station that re-fuel every month. The station I use refills the diesel tanks with (2) trucks per day! Busiest Mobil in MA.
Richard. You will not have a problem in the old diesels since they are not that complex, per say. But in 1994 or newer the additives is not needed because of complex injector & electronics. [censored], even in the Powerstroke book it says it in black in white.
Ford did not tell the diesel owners because they copied parts International manual 100%; but, Ford forgot to mention that International used coolant filters that had the SCA in it.
Ether is bad for a diesel also. I had heard of the WD-40 but again if you use a good fuel, glow plugs are kept up (TPM=total preventive maintenance) you will not need it. I would not try that on a Powerstoke, Duramax or Dodge Cummins. The old ones yes, but the electronics on the newer ones are very touchy and should not have anything sprayed into them. Cause sensor problems etc. I know a guy at work that did that and caused a complete mess on his 1995 Stroke. Ford did not cover the damage since the manual said not to do it. Touch luck for him.
As far as towing, that is another issue. It comes down to undue stress on frame, motor, a fatigue over time & safety issues. Never mind break wear, heat on engine (turbo on newer models)….Just because you think it is not wearing it, it is.