Fue Gelling Question

Fuel will thaw just like spring snow. You'll be fine. DEF is a different story stored that long I believe. Moot point since you have a 2007 though.

Yes, it will be fine as soon as it warms up. By that I mean the fuel gets into the teens for temps. It will be fine by this time of year.

Additives help, and blending with or using #1 fuel is even better. If you don't normally winter in cold weather, I wouldn't be worried about it at all.


Edit to say: The post above mine is correct. It got posted while I was typing.

The fuel filter is the first place that the fuel gells up (assuming an engine is running). The gell point for #2 diesel is just under 20 degrees - at which point wax crystals will start to form in untreated #2 and clog the filter. Once the fuel re-warms, the wax dissolves back into solution, unclogging the filter and allowing fuel to reach the injector pump.

Gelled fuel does not stay gelled once the outside temps warm up. It's not like making Jello. Once the fuel is warmed and the wax crystals are dissolved, it is exactly like any other diesel fuel that has never gelled. It's like comparing water to ice. Once ice is melted, it's water.

I don't have any experience with gelled fuel, but I would suggest draining the fuel water separator to see if the fuel is gelled or not.

Good luck...

Thanks, folks. My truck has never experienced really cold weather because I usually set up in warmer climates. I do have some diesel additive, which I'll add before start-up. I hope there'll be no long term engine damage due to sitting idle so long.

It will be fine. The temp. has to be about 0 degrees or below to gell and once it warms up if the fuel did gell it goes back to normal with warmer temp. You don't have to but you could pour a bottle of power service in the tank to disperse any water. or just start it and go.

Yes. It should be fine - as long as temps are above 20 degrees (the gell point of diesel fuel) when you want to drive it.

In cold winter temps, one solution has always been to tow a truck with gelled fuel to a nice warm garage and wait for the fuel to 'un-gell'. Once the fuel returns to it's normal liquid state, you can drive it (assuming warm outside temps). I've been through this several times in the past.

Yes probably depending how cold it is now. Did you try to start it?
Yes 911 will un gel it now if needed.