this may have already been asked, but i have a 05 dmax, i love this truck, but i am a little concerned about this new low sulfer fuel hurting my truck. i figure i will run some kind of lubricant in my fuel, but is there anything else i should do to help prevent future problems????

oh and p.s. thanks to all the wacky tree huggers for this new fuel, less mpg more expensive fuel, and now it will take more fuel to go the same distance as before, real smart

sorry for the rant, i am all better now thanksCensored

biodiesel has good lubricating properties and helps clean out the system. Adatives will be a must IMHO for the new #2.

Aftermarket additives are not, and will not be, a must in my opinion and you'll find most people don't use them. All fuel arrives at the station with an additive package already in it to assure that the level of cetane, lubricity, etc. meets ASTM spec requirements and this will be the case with the new lower sulfer fuel as well. Aftermarket additives are not recomended by most engine manufactures and some companies go so far as to state that they are "forbidden" as does injection maker Bosch.
http://www.ethanolrfa.org (http://www.ethanolrfa.org/objects/pdf/2003dieselrecommendations.pdf) You might want to check your owner's manual, in particular the diesel supplement. Your dealer is another source of information as are some of the oil company sites such as Chevron that address fuel matters in detail. http://www.chevron.com/products/prodserv/fuels/bulletin/diesel/L1_toc_rf.htm You will also find many opinions in the "Fluids Discussion" section on the DP or by doing a search. My .02 cents is that an additive that is approved by GM (check the great F&Q by briano at the top of this section) to increase lubricity can't hurt and I do use one myself.

I beg to differ bio diesel has little to no lubrication.This was the same problem when the started to use low sulfer from high sulfer.I can tell u this when i load "bio" it is like 120 to 150 deg.this product uses no placards because its not flamible(real high flashpoint)For those who dont know most ls#2 is cut with "bio"
11% bio in a tank of LS#2(this will be ls2 b10) will get the station a tax break none of that is passed to the consumer.But the problem will be winter bio will turn to jelly like at 20 f .this is all very new but being in the fuel industre we will get it down.
To sum it up stick to 20% bio to be safe imo[-][-]

I beg to differ bio diesel has little to no lubrication.This was the same problem when the started to use low sulfer from high sulfer.I can tell u this when i load "bio" it is like 120 to 150 deg.this product uses no placards because its not flamible(real high flashpoint)For those who dont know most ls#2 is cut with "bio"
11% bio in a tank of LS#2(this will be ls2 b10) will get the station a tax break none of that is passed to the consumer.But the problem will be winter bio will turn to jelly like at 20 f .this is all very new but being in the fuel industre we will get it down.
To sum it up stick to 20% bio to be safe imo[-][-]
Did I miss something somewhere?? I don't see where anyone said Bio "has little to no lubrication". In fact Lakingslayer said the opposite and I would agree that it does increase lubricity. Not sure what you're getting at.

Your statement "Most #2 is cut with Bio" is most interesting. Can you provide some reference as it would make interesting reading. I for one am all for the advancement of Bio.

Ive read the same on bio having sub standard lubricity. From what ive heard they dont have bio diesel anywhere near perfection yet either. I was told that it emulsifies with water and cant be seperated like diesel and water can thus the use of water seperator filters on most equipment since the 80s.
I dont want to sound negative on the bio thing, I think its a good direction and will help our nations growers as well as myself in the farming community, however,,,, I own plenty of diesel engines to farm and harvest with and I will not be touching bio for quite some time until the technology is further refined, no matter how it helps my economy, its still not good for my engines,pumps and injectors. Its been proven there is premature pump and injector failure due to emulsified bio diesel.
BACK TO THE SULPHUR,,,, I had a problem with a natural gas engine I overhauled 3 times for a customer who insisted on switching to LOW SULPHUR engine oil mid stream when the engine had about 3000 hrs. Delo 400 was used up til the point in which he switched,,,, in a matter of 20 minutes after changing to LOW SULPHUR Exon product called Estron 15-40, he lost the camshaft. I overhauled the engine replaced all valve guides,lifters and camshaft as well as all the rest of the usual parts AGAIN, cam shaft went in 5 minutes, took it down to the short block, but a cam and lifters thinking there was some sort of break in problem, AGAIN lost cam and lifters in 5-6 minutes. Upon finding out that the customer had stopped using Delo and went to estron LOW SULPHER I had the supplier rep come out to look at the parts piles and was told there isnt anything wrong with the low sulphur engine oil and it was an assembly problem. OK another cam and lifters, pistons, liners,etc, I went back to Delo 400 not telling the customer and it ran,and ran, and ran, and has continued to run for the last 7 years. He never ran low sulphur engine oil again. Come to find out the LOW sulphur would not hold up under extreme heat,,, This natural gas engine ran about 1100 degrees on the manifold, pretty normal with such a dry fuel, turns out the exhaust valve guides were cooking the oil off at the temp and siezing causing cam failure. My duramax hits more than 1100 DAILY.
Sure your question is about low sulphur in fuel, Diesel is a lubricant for fuel system parts too. I learned my lesson. Go with whats worked for years.

Ive read the same on bio having sub standard lubricity. .
Thanks for the info! I知 not that up on Bio. I can see how an emulsification problem with it could destroy any semblance of lubricity with the overall product (or particular batch) and introduce a host of other problems as well. Are you saying the lubricity problem is inherent and aside from the emulsification problem, or is the problem due to its emulsification tendency?? Can you point me toward any solid testing that痴 been done or some good reading material? This is in no way meant to cast doubt on your statement but I知 merely trying to learn more about bio on a chemical level. I have read where the University of Connecticut touts Bio for its high lubricity among other benefits. http://ccea.uconn.edu/studies/Biodiesel%20Report.pdf (http://ccea.uconn.edu/studies/Biodiesel%20Report.pdf) I致e also read that a phase layer will form when Bio is mixed and shaken with water just as well as and as rapidly as straight diesel if it has been processed properly and in particular if it was titrated and washed properly.

In addition I知 aware of reported problems of coking and varnish build up with straight vegetable oils but have seen nothing negative in regards to lubricity problems with well processed Bio. Commercial Bio in the US falls under ASTM D-6751 and that would put water and sediment levels <500 ppm which would surely indicate no problems with emulsification. I realize that incomplete or improper processing can leave mono and diglycerides as well as methanol, all emulsifiers, in the blend. For now I値l assume the problem of low lubricity is an emulsification one and not relevant to properly processed Bio. I understand lubricity levels also differ according to different starting oils used. Please get back to us if I知 incorrect and you have reference material indicating the problem is inherent in correctly processed Bio. Thanks for the informative post!

The following were tests performed by The National Renewable Energy Laboratory
1617 Cole Boulevard
Golden, Colorado80401-3393
A national laboratory of the U.S. Department of Energy
Operated by Midwest Research Institute
for the U.S. Department of Energy
Under Contract No. DE-AC36-83CH10093

Project Title:
Biodiesel Lubricity Quantification--Low Blends
Background:In some diesel engines, the diesel fuel is used as the means to provide lubrication of some of the moving parts, mainly rotary fuel pumps. The 1993 introduction of low sulfur diesel caused a series of problems, some of which were poor lubricity. However, research has indicated that biodiesel has significant lubricity benefits. This research examines the lubricity of low-level biodiesel blends and compares the results to commercial lubricity additives.
Objective:To define the effects of increasing concentration of biodiesel on various diesel fuels available in the market today using the latest lubricity test methods available in 1997.
Status:Extended to September 30, 1997
Accomplishments:
Biodiesel with both No. 1 and No. 2 diesel fuel showed substantial lubricity improvements with percentages of biodiesel below 1% using both the HFRR and the SLBOCLE.
Results on blends of No. 1 and No. 3 diesel with biodiesel using the SLBOCLE were mixed--this is likely due to the inherent analytical variability associated with the test methods.
Stannadyne, a leading diesel fuel pump manufacturer who ran the HFRR testing, suggested the addition of 2% biodiesel would solve the lubricity problems being experienced in petrodiesel fuels today. [A point for honesty for them in my book as they sell additives to increase lubricity.]
Participants:Williams Pipeline, National Biodiesel Board
Sponsoring Organization(s):National Biodiesel Board
Point of Contact:Ms. Bev Thessen, National Biodiesel Board, P.O. Box 104898, Jefferson City, MO, 65110-4898, phone 573.635.3893, fax 573.635.7913

I was actually thinking from the time when I was told by a friend who has a Diesel shop which rebuilds all injection systems, including pumps and injectors,, that bio draws moisture over a short period of time much like Alcohol, or Methenol. I have experience with Methanol in small two stroke applications and if you dont purge the system with regular gas your looking for trouble, and the fuel system, containers, and parts would draw water residue in a matter of minutes, especially in humid or cold damp conditions.

I think sure that once bio is mixed with water its looses its value, Just like regular hydraulic, or motor oil, but I think its the seperation on demand thats the problem. Demand meaning while the engine is running and the fuel is traveling from tank past seperation filters and so on.
Im not by any means an expert on the subject but the information I was given was from a very knowledgable person who warned me of the effects of these first stages of bio diesel production. And He was by no means swayed either direction for financial gain like a salesman, or someone trying to push thier product, or give horror stories about the other alternatives.
Every thing I was told on bio makes perfect sense, but it all seems to me at this early stage to be a gamble for long term performance and component life.

i do not know where you guys get that it lubs less but every thing read till now says it does.

U.S. ASTM fuel spec is for 520 wear scar diameter HFRR. Bosch says minimum acceptable is EU standard EN590 - which is 450 wear scar diameter HFRR. Bottom line - it's best to add a little stanadyne lubricity additive to ensure proper lubricity levels.

When the U.S. goes ultra low sulfur diesel fuel (ulsd) at the end of this year - stay away from additives with alot of cetane booster. It can destabilize the ulsd. What does this mean to you? Fuel will turn to asphaltines and plug filter, etc.

jeff