It was -16F in central Indiana Christmas eve. Driving home (on #2) I kept loosing power, and the truck stalled once. I flipped the switch to veg oil, which I wasn't using because it was so cold, and it started and ran fine. The veg oil fuel side is all heated, electric filter, coolant for the tank and lines. I was told the #2 was fine until -12F. I expected that gelled fuel would totally shut you down, but my truck would still idle fine, was I experiencing something else related to the extreme cold? I haven't been using any conditioner in the #2, just running it as it comes.

Hey, 'nother question to raise here:
If your fuel gels, do you have to change the filter right afterward?

The fuel can gel partly/slowly, thus clogging lines and filter, but still letting through enough to give you a steady idle. When it gels more, things get totally clogged.

Changing the filter shouldn't be neccessary once it becomes warm enough for the fuel not to gel. And the filter is mounted on top of the block where it should get quite some heat from the engine (at least that is where it sits on mine).

You just made the case for fuel heaters pre liftpump.

Even better case for RACOR filter with heat element pre lift pump, will get out chunks from WVO and preheat fuel with 12 heating element, not required here in Southern US but probably not a bad addition for the heat element in cold climates.

it got to -20 F friday night here and my dads truck wouldnt start when we left midnight mass. sprayed either in it awhile and finally got it started after it ran off of either and me holdin the peddle to the floor. think he had fuel line freeze up. im kinda glad i didnt drive my truck around friday and saturday. fuel could have been gelled in it and would have even known it. didnt know #2 was only good to -12.

It seems the gelled issue has worked itself out. I started it yesterday, let it 'warm' up in the drive and started off. Much above 15 mph and it would loose power. So I drive slow for a while to build some heat and switched to veg and it was fine. So I drove for about an hour, switched back and everything was okay. TD, you're right about the heated racor, they're great up hear, that's what I use for the grease side, a 1000FH that I bought from Greasel.com that has an aftermarket heater that heats it up to 180F. I was going to use it for both, turn the heater off for #2, but it would of made my purge times at the end of a trip too long.

The guy I was talking to about the #2 gelling recommended using25-50% Kerosene in the cold to prevent gelling. He says all the K around here is undyed so not much to worry about. Will Kerosene harm anything? I was concerned about it not having the additives that are added to #2 to take the place of the sulfur.

Why not just buy #1 fuel to mix in instead?

Where can you get Kerosene? What's the price of it? --- I'm just curious, as we cannot get it here.

20% of Petroleum can help to keep the fuel from gelling, and it's better than adding gasser-fuel. Do not use more than 10% of fuel.

Why not just buy #1 fuel to mix in instead?The stations around here just sell #2 and Kerosene, no #1. The Kerosene usually is the same price as the #2. There are signs telling you not to use it in a vehicle, and the pump hoses are too short to pump into anything but a can.