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diesel fuel gelling

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zoidberg

02-12-2004 06:03:11

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At what temperatures do straight number 1 and straight number 2 diesel fuel gel? Does it ever get too cold to make a diesel engine run? How about a gas engine? Thanks for your responses. Z

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dick

02-12-2004 21:36:27

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Re: diesel fuel gelling in reply to zoidberg, 02-12-2004 06:03:11

If you run good fuel you will not have any trouble down to 0. I haul manure daily and run BP fuel has never gelled. I use no additives.I live in north east ohio.

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Bus Driver

02-12-2004 15:09:23

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Re: diesel fuel gelling in reply to zoidberg, 02-12-2004 06:03:11

In some parts of Russia, it gets as low as 50 deg below zero. Some of the oilfields are in such areas. The diesels use heat exchanger to have the exhaust warm the intake air. The engines are not shut down until warm weather.

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Jed

02-12-2004 10:13:43

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Re: diesel fuel gelling in reply to zoidberg, 02-12-2004 06:03:11

Paul has pretty well covered everything you asked and I agree.

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paul

02-12-2004 08:59:28

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Re: diesel fuel gelling in reply to zoidberg, 02-12-2004 06:03:11

Got this from a Dodge site, seems about right. I've heard the wax crystals start to form at 28 degrees in #2, but don't cause problems for some time yet. At 10 degrees I've had problems with #2. Ran the tractors at -15F with a little #1 blended in, and some Power Service. One diesel will start at about -5F with no heating, the other 2 need heating if it's much below 25f. Thiner oils & being run every day & a _strong_ battery will help. With a synthetic oil & good proper fuel treatment & intake air heat from a blow drier or such, you can probably get a cold diesel to fire up about the same as a gas tractor.

Once you get to -20, the battery is so weak & the belts so stiff & the oil so thick it's hard to get anything to fire. You need to plug in & preheat, and then either will fire up. Once running, with enough conditioner in either fuel, it should keep running. A diesel can run so cool it might not want to keep running at idle with no load at extreme cold.

--->Paul

Q: Should an additive be used in the fuel to keep it from clogging the fuel system? Below 15 degrees F, wax crystals begin to form in diesel fuel. These crystals form a gell that will clog the fuel filter or fuel lines and stop the engine as the temperature drops toward 0 F. Any good "winter fuel conditioner" for diesel fuel will keep the fuel moving to at least -20 degrees. Follow the instructions on the bottle!

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rustyfarmall

02-12-2004 09:16:11

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Re: Re: diesel fuel gelling in reply to paul, 02-12-2004 08:59:28

Just want to add one comment, quite a few of the over the road diesel trucks use a system which consists of tubing coils in the fuel tank, and warm engine coolant is circulated through these coils to keep the fuel warm and prevent gelling.

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Redman

02-12-2004 18:35:45

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Re: Re: Re: diesel fuel gelling in reply to rustyfarmall, 02-12-2004 09:16:11

also have inline fuel heater,the fuel is delivered to the pump at around 70 degrees.

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