Fuel Gelling?? - Chevy and GMC Duramax Diesel Forum
07.5-2010 LMM Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 39 (permalink) Old 12-09-2010, 07:15 PM Thread Starter
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Fuel Gelling??

New to diesels. I know the fuel can gel at low ambient temps. About what temp does this occur? What is the effect on the engine? And how can you tell if your problem is due to fuel gelling?
What keeps the "Ice Road Truckers" from gelling? Fuel additives, some sort of fuel heaters?

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post #2 of 39 (permalink) Old 12-09-2010, 07:38 PM
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dont really know what temperature it happens at but i throw a splash of additive if its cold (days when its about a high of 30F, and goes into the teens at night) when i fill up.

Heard from a decent amount of truckers that Howes diesel additive is the best.

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post #3 of 39 (permalink) Old 12-09-2010, 07:39 PM
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you can buy anti gelling and cold treatment additives for your diesel to use every tank
Winter Additive

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post #4 of 39 (permalink) Old 12-09-2010, 07:47 PM
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The northern states have a winter blend of diesel that is gel resistant down to like -20f I want to say.
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post #5 of 39 (permalink) Old 12-09-2010, 07:49 PM
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Gelling can start as high as 20. Most colder climate areas will either have a winter blend like 1/3 No 2 diesel 2/3 No 1 diesel or similar and will be displayed on pumps or will have #1 diesel and #2 diesel pumps so you can blend your own(also displayed on pumps). I use #2 primarily in winter and double that recommended rate of Stanadyne or good anti gel additive until it gets into sub zero continuous temperatures before I add #1 with additive. With winter blend of #1 and #2 you will get less fuel economy. Additive does not reduce economy. I use additive from time we start seeing 50 degree highs until again continuous above 50 degree highs.

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post #6 of 39 (permalink) Old 12-09-2010, 08:31 PM
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My dad has a Duramax and it got down to -23 last year and his never even sputtered. He didn't have any anti gel stuff in either. I had howes in mine and i think the howes must of gelled up because it only goes to -20 I believe and a message came across that said fuel filter plugged and we get fuel from the same place. I think he was running the winter blend so that probably helped. Avoid biodiesel at all costs.

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post #7 of 39 (permalink) Old 12-09-2010, 11:12 PM
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are you gelling?

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post #8 of 39 (permalink) Old 12-10-2010, 05:46 AM Thread Starter
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Nah, I ain't gelling. lol Low temp yesterday was in the mid teens and high was high thirtys. Not typical for SC. Just curious.
My owners manual says the use of additives is not necessary or recommended. I wonder if that includes fuel anti-gelling products?
Thanks for the replies guys.

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post #9 of 39 (permalink) Old 12-10-2010, 06:47 AM
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[QUOTE=Bill T;949876]New to diesels. I know the fuel can gel at low ambient temps. About what temp does this occur? What is the effect on the engine? And how can you tell if your problem is due to fuel gelling?
What keeps the "Ice Road Truckers" from gelling? Fuel additives, some sort of fuel heaters?[/QUOTE]

Lot of the trucks in cold country are never turned off when it get so cold. Run then 24/7-!

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post #10 of 39 (permalink) Old 12-10-2010, 07:13 AM
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I use a fuel additive and cetane booster in every tank regardless of manual. Fuel starts to gell at around 40 deg F. In the South, I just run a regular AMSOIL Fuel Concentrate but they also offer one with a cold flow additive to help keep fuel from freezing in really cold climates.

If I can help with any of these products, please don't hesitate to PM me.

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