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  #1  
Old 04-11-2007, 04:39 AM
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Viscosity of Diesel Fuel

Anyone know what the actual viscosity should be?
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Old 04-11-2007, 04:49 AM
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Depends on the temperature, ULSD/LSD, batch quality, additives, and refinery that made it.

What are you specifically looking for?

2.2 to 5.3 cSt at 40*C is whats normal. At 210*F, the viscosity of diesel is about 1.3 cSt. At 0*F, it's about 28 cSt. (centistoke *cSt*- A unit of measure representing 1/100th of a stoke (S), which is the fundamental unit of kinematic viscosity.)

Last edited by ForcedInduction; 04-11-2007 at 04:54 AM.
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Old 04-11-2007, 05:48 AM
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really just trying to test true diesel against a wvo blend to see how close I can get them. Havent gotten my tools yet to measure viscosity yet, but just wanted an idea of what I am looking at.
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Old 04-11-2007, 01:00 PM
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Search the web for an MSDS on what you are looking for. It should be out there somewhere.

-Jim
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Old 04-11-2007, 01:20 PM
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See if this helps http://www.frybrid.com/forum/showthread.php?t=27

Dave
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Old 04-11-2007, 01:30 PM
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Quote:
Originally Posted by asnowsquall View Post

Yup..that corresponds to the information that I have. WVO needs to be heated to 180F to get near #2's viscosity. I'm going to try a heated fuel filter and injector line heaters to see various situations/blends and then the result. Mostly, I will be running Bio-D, but am planning to run a blend of WVO during the hot months.
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Old 04-11-2007, 01:35 PM
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That is exactly what I was looking for. Thanks!
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Old 04-11-2007, 01:36 PM
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Quote:
Originally Posted by probear View Post
Yup..that corresponds to the information that I have. WVO needs to be heated to 180F to get near #2's viscosity. I'm going to try a heated fuel filter and injector line heaters to see various situations/blends and then the result. Mostly, I will be running Bio-D, but am planning to run a blend of WVO during the hot months.
If your blending it's already thinned out and does not need to be heated.
That's the whole reason for blending.
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  #9  
Old 04-11-2007, 01:39 PM
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Originally Posted by dannym View Post
If your blending it's already thinned out and does not need to be heated.
That's the whole reason for blending.
Not 'blend' as in RUG. Blending as in WVO and Bio-d or #2. I won't run a RUG blend, and especially using heated injector lines.
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Old 04-11-2007, 01:43 PM
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well that is my main reason for getting this information, so I can actually test my blend and see how it compares to true diesel.
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  #11  
Old 04-11-2007, 03:37 PM
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Quote:
Originally Posted by probear View Post
Not 'blend' as in RUG. Blending as in WVO and Bio-d or #2. I won't run a RUG blend, and especially using heated injector lines.

Heating the veggy is Less of an issue with the Bosch PES IP on the Mercedes....

These pumps will practically pump molasses if given the chance (Ask me how I know! )

The main issue is the fuel Viscosity at the Injector Nozzle inside the engine for atomisation....

This will be at whatever temp the cylinder-head is at, and no amount of Fatty's heaters will alter that. What they May do is thin the veggy temporaraly while on the way to the Injector. There May also be a 'Histerysis' effect on Viscosity however even after cooling which could work to advantage while using line-heaters...I need to confirm this hopefully later this year with access to proper test-facilities

RUG blends are Much to be preferred to Nos.2 and veggy blends. Stick to Under 15% RUG whether you have line-heaters or not, and all should be well....

FWIW, Its NO good using fuel-Injectors that have done More than around 50-60K miles, You'll be really dissapointed after 500-800 miles when it refuses to start cleanly and smokes even when hot, as well as the economy dropping like a stone

You'll also need a Timing Alteration for veggy/BioBlends. It has been determined by testing around 4 degrees Extra advance is a good setting
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