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Old 12-29-2006, 12:49 PM   #1 (permalink)
hidesertwheelin
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What temp does diesel gel?

At what temp does diesel gel?
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Old 12-29-2006, 01:44 PM   #2 (permalink)
oliver454
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I don't know but we have run in -33 C. so far this winter and no problems, touch wood. Pump fuel and Stanadyne.
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Old 12-29-2006, 02:03 PM   #3 (permalink)
rock_shoes
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Gas stations in Canada automatically sell a winter blend this time of year. That's why you haven't gelled yet. Not positive but I think #2 gels between -5C and -10C. Somewhere in there.
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Old 12-29-2006, 02:18 PM   #4 (permalink)
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I live in Las Vegas, not known for its cold temps, but I have some property in central Nevada where the temps get to about zero *F at night. I've been wanting to go check out the property but was worried whether my Vegas-bought fuel would gel on me. My last two fill-ups, I put some fresh fuel in a glass jar and put the jar in my freezer. I tested the temp of my freezer and found it to be right at zero *F. The fuel turned a little cloudy, but shaking it, it seemed to be just as liquid as it was when I put it in there. These samples came from a local 76 station and a local Shell station. I've been told all of our gas & diesel fuel comes up the same pipeline from refineries in California and it is all the same when it gets to the distribution tank farm in town. Then, as they load it in trucks to take it to the stations, they supposedly put in the various additives required by the various brands. So I don't know, but diesel fuel from some of the independent stations may gel at a higher temp. I haven't tested those.
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Old 12-29-2006, 02:21 PM   #5 (permalink)
rock_shoes
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Just buy a good antigel to use before you head up there. The one I picked up is good for -45C when used to treat #2.
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Old 12-29-2006, 10:24 PM   #6 (permalink)
RDB
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The Cloud Point of typical #2 diesel ranges in temperature from 20F to as high as 40F. #1 diesel has a cloud point of -40F.
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Old 12-30-2006, 02:12 PM   #7 (permalink)
VegasDMax
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How does clouding relate to gelling and what does cloudy fuel do in the injection system/engine? My test samples were definately very cloudy at zero *f, but as I said, they appeared to be just as liquid as at room temp. As they warmed up, the cloudiness went away, but I didn't check any temps as the cloudiness disappeared.
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Old 12-30-2006, 02:53 PM   #8 (permalink)
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Cloudiness is wax and tends to clog the fuel filter.
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Old 12-30-2006, 07:24 PM   #9 (permalink)
RDB
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Cloud Point is the temperature at which waxy solids first appear during cooling of diesel fuel. Keeping diesel fuel at cloud point over an extended period of time or cooling the fuel further will result in more extensive formation of wax solids.

Since fuel filters are vulnerable to plugging below this critical temperature, cloud point is the "fail-safe" operability standard adopted by the petroleum industry. It is also the primary cold flow property recommended by the Engine Manufacturers Association and the American Trucking Association's Technology Maintenance Council.

For more information try this website: http://www.promiles.com/PhaseTech/Default.asp

Last edited by RDB; 12-30-2006 at 07:26 PM. Reason: added more information
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Old 12-31-2006, 11:01 AM   #10 (permalink)
A1Albert
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I just googled ( cloud point of diesel ) there is alot of reading if you want to.
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