Trucks gelling up in the winter, what is the solution?

While this does not answer your question about #1 and #2 here are some considerations. Did he add the anti-gel before or after filling the tanks? Best to add before filling. What rate/how much did he use? The amount of gallons of fuel determines in part how much to use. Take Howes for instance, there is a rate for above and below zero. Below zero is double the rate and with the temps in Iowa close to zero and with the wind chill while driving any temp close to zero I would be using the double rate.
From the Power Service website:
Diesel 911 does not prevent fuel gelling – use Diesel Fuel Supplement +Cetane Boost (in the white bottle) as a preventive measure to keep fuel from gelling.

 

Well I've never had gelled fuel with #1 fuel.
#2 with crazy amounts of additives I've had gelled many times.
This was all with tractors sitting outside not running.

they say the 911 doesn't help prevent gelling just helps fix ince it does gell. which doesn't make sense to me.

 

Gelled up running down the road or gelled up while they slept?

A 50/50 blend will get you down below zero if you plan on turning the truck off. I think the cold filter plug point for #1 is around -25 or so.

If it’s around zero and colder I let mine run. I doubt it will get shut off until after the weekend.

 

Also, biodiesel calls for higher dosages as well.

 

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50-50 #1 and #2 would lower the gel point some but best to use #1.
In Alaska,-30, I had a truck started,it ran a few minutes then quit.I dumped some 911 in it and got it started again,after a few minutes it smoothed out and ran good.911 is more like a deicer I think.
A lot of places use winterized #2 blended fuel,it depends on the area.
If I was driving the truck that gelled I would leave it running and put #1 in at 1/2 tank,run it some more,especially if it stays below 0.

 

Information on diesel cloud point.

How is No1 Diesel Used for Winter Blendings? - Diversified Energy Supply

 

Some more info.

https://www.kwiktrip.com/our-story/fuel#Diesel

 

I read #2 has a "cloud point" of -10, #1 is almost -40. Trouble is, where you going to find #1 at a truck stop today? I heard old timers mixing in a little gasoline, but I don't recommend that with todays motors. A 237 Mack, no problem. Whatever you do, do something, as I hear it's supposed to be REALLY cold this weekend and next week east of the Rockies, like -10 for HIGH! Please be careful out there, dudes, we're depending on you!