Add Sulfur to Diesel fuel?

[crashz]

From what I know of diesel injections systems: The new high pressure injection systems are a completley different animal for the past fuel systems, as injection pumps (positive displacement, but not pluger style!) that rely on the fuel to cool the pump more than lubricate it. Old systems use a plunger type of pump (inline or rotary) that are completely dependant on the fuel as a lubricant for very close tolerance, moving parts under strain. The plunger or piston requires lubrication in the bore, and some are cam driven, therefore the cam face requires lubrication. At reasonably high injection pressures (say 1000 psi), this puts a lot of strain on those hard parts.

Introduce any particulate matter into the system, and either one will wear significantly and loose the close tolerances, increasing slip, and decreasing availible output pressure.

Therefore any diesel fuel system would benefit from additional filtration and water separation, but the older piston/plunger style pumps will see much more benfits in addtional lubrication. Not to say the high pressure systems won't, as the lift pumps may last longer and the fuel viscosity would be increased slightly, but there is less of an actual wear issue there.

 

[Skyco]

Yall must either live in hippyville or a near a huge city, where do you buy these various blends of biodeisel? I have never seen it anywhere i go in GA or SC?

The nations leading retailer of bioD is based in SC, 41 Spinx stations in the upstate sell it. I also know of one in Aiken and one in Columbia, both supplied by United Energy.

 

[mwb]

2nd adding some bio-diesel. Far better than any additive and no snakeoil - you can still add klean-flo or whatever you normally use without concern.

Read the link posted by Ken45101! (Post #4)

 

[ModMech]

ALL diesel fuel systems use fuel as a lubricant and all use some form of piston type pump. Yep, from the Bosch rotary to the Bosch MW and P to the Common rail of today, ALL use piston pumps.

Most, if not all, in-line IPs use oil to lubricate the cam and lifter along with the govornor sections where-as the rotary type and Common-rail pumps use fuel only.

Some of the factors we can't see are coatings and metallurgy, these have changed a LOT over the years.

DI and IDI injectors generally operate at 4500 PSI and less, VOP. Current Common Rail injectors, well they are somewhat higher at 33,000 PSI VOP. Yea, higher!

Biodiesel has EXCELLANT lubrication qualities already and there is no need to augment it at all. No OEM that I know of endorses or recomends a lubricity addative, anti-gel addative is a different story.

 

[Dargo]

One of my neighbors works at this http://countrymark.com/userfiles/File/_2_Diesel_ULS_-_0610.pdf refinery. I linked their MSDS sheet for diesel because it contains a bit more info. However, it has been made clear to me by my neighbor and their employees that I do not need to add anything, zip, nada, to their diesel for older equipment. They said they are not alone in saying this since every refinery they are aware of replaces the slight lubricity lost by removing sulfur, which is actually a contaminant itself.

There are companies who spend tens of millions of dollars in advertising telling you that you need to add this product or that product or your engine is going to prematurely self destruct. The facts are that, in almost all circumstances, no additive is needed and most actually are the source of problems, not anything that reduces problems. I'll stick with what comes out of their refinery with nothing added to it. If the most expensive diesel engine I own, a Cat C9, only makes it to 600k miles rather than 750k miles before the average rebuild time, so be it. It has 33k miles on it now. At the rate I'm going, I'll be somewhere around 300 years old by the time I'd notice.

 

[Skyco]

No OEM that I know of endorses or recomends a lubricity addative, anti-gel addative is a different story.

Ford certainly does!

Motorcraftï½® Cetane Booster and Performance Improver
Helps improve Ford diesel engine performance
Note: This ultra-low sulfur formulation can be used in engines required to meet 2007 emissions requirements (e.g., Fordç—´ 6.4L diesel engine) and is backward compatible as well (i.e., can be used in Fordç—´ 6.9L, 7.3L and 6.0L diesel engines)
Ultra Low Sulfur Diesel (ULSD) compliant
Combats the effects of poor-quality diesel fuel
Boosts the cetane rating (fuel ignitability) of diesel fuel for improved starting performance
Increases power
Helps smooth engine operation
Improves fuel economy
Adds lubricity to fuel to reduce engine wear
Recommended by Ford Motor Company

Available in four (4), six (6) or twelve (12) 20-fluid-oz. bottles


Motorcraft® Brake & Engine Performance Fluid & Cleaners ? The Official Ford Parts Site | FordParts.com

 

[crashz]

ALL diesel fuel systems use fuel as a lubricant and all use some form of piston type pump. Yep, from the Bosch rotary to the Bosch MW and P to the Common rail of today, ALL use piston pumps.

I didn't know that that common rail pumps were piston pumps. Didn't think it was possible to develop those pressures with a piston pump. Good to know.

 

[beppington]

I gotta figure out how to post like this... you can answer twenty questions with one post.

Click the little "Multi-Quote This Message" button

on every post you want to respond to, then click the "Post Reply" button

at the bottom-left of the page.

 

[Ken45101]

I didn't know that that common rail pumps were piston pumps. Didn't think it was possible to develop those pressures with a piston pump. Good to know.

I always thought that piston pumps were the way to get high pressure. What else produces high pressure?

Just curious.

Ken

 

[Willl]

No OEM that I know of endorses or recomends a lubricity addative,

http://www.bosch-kraftfahrzeugtechn...kus_1/FIEM_Common_Position_Statement_2009.pdf

If I'm understanding this paragraph correctly, their numbers are confusing. :confused2:

Lubricity: It is essential that the lubricity of the fuel as measured by the HFRR test specified in ISO
12156-1 meets the requirement of a wear scar diameter not greater than 460 microns. In addition, it is
recommended by the Diesel FIE manufacturers, that first fill of the fuel tank should be with fuel with
good lubricity characteristics (HFRR < 400 μm) in order to guarantee good run-in of the injection system
components. The US diesel specification (ASTM D 975-09) includes a lubricity value of 520 μm maximum
(according to ASTM D 6079). It is expected that the useful operating lifetime of any mechanical
component will be adversely affected by fuel with a lubricity exceeding 460 microns.