Re: gelled diesel fuel

Posted by paul on January 29, 2022 at 20:03:02 from (66.60.215.13):

In Reply to: gelled diesel fuel posted by Charlie M on January 29, 2022 at 17:01:56:

#2 diesel fuel starts thickening at 25 degrees, and will plug many fuel filters by 15 degrees f.

Often times a filter has already been in a long time, and is already restricted, so the thickening waxy bits plug it up fast. A new filter might work down another 5 degrees.....

Anyhow, 25% kerosene should make things work in your temps. Probably could work with less.

Or a few ounces per 10 gallons of the additives, Power Service or the others. This would be simpler and cheaper. They really work, anyhow down to 15 below f or so, after that you want both a blend and a treatment to keep things flowing.....

Your problem is now the waxy stuff is all packed around the filter, even if the air warms to 35 degrees, the filter might be slow to warm and to flow again.

These treatments work much better if treated before you need them, rather than after......

Many states use some bio diesel fuel. Here in MN we have up to 20% bio fuel in summer, and 2-5% biofuel in winter. The bio portion will gel up a little sooner. So if your people bought summer diesel fuel and put it in, one could have 20% bio in the winter furnace and it might jell up at 20 degrees f, and be really hard to blend out even at 25% kerosene.....

More info than you wanted, Im in Minnesota we are running diesel farm equipment at minus 15-23 so far this winter.
I also have a fuel oil furnace in the basement and am familiar with it gelling when the temps get to minus 25. A bucket of hot water set under the exposed filter by the tank is the quickest to get heat back running, but you need to get fuel treatment in too as the hot water is short term fix!

We run into odd stuff. When I was a kid and got my first diesel tractor, it ran summer diesel all winter blowing snow, never hells. Didnt know why anyone made a fuss about it. Well, the plug in coolant heater was mounted right below the fuel filter, and plugging the tractor in for an hour the heat rose off the tank heater and warmed the fuel filter. The main fuel tank is above the engine, so the engine block heat kept the fuel warmed over time. According to me in that first year, fuel gelling would not be an issue its just imaginary.... we alllearn and realize there are no hard rules on this.

I would suggest you add some Power Service per the label to your furnace tank, and be sure to run it when the temps warm up so that wax already in the filter can get dissolved back into the fuel. Or Id add 20% kerosene.

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