I just had a mechanic tell me not to additive through the Dmax. I wanted to here some of ya'll's opinion. I do not believe it.


MMBD

As usual another mechanic that is giving out wrong info. GM says Stanadyne is ok. Guys on this site use all types of additives. I'm sure they will chime in here.

Boy have you asked a hot button question...http://www.dieselplace.com/forum/smileys/Confused.gif


There are a number of threads about that, try a few searches and you'll find lots of opinions on the subject, but I'll try to give you a brief run down.


GM will only recognize de-emulsifying agents that allow the water to precipitate out and theorectically be trapped by the filters. They don't want any water running through your fuel injection system which runs at about 23,000 psi. Water at that pressure can really erode your injector tips among other things.


Some here swear by the usual emusifying agents that break up the water into smaller particles and run it through the system. Those are usually the alcohol type additives. If you have a problem and GM finds alcohol in the fuel, your warranty is toast. Not a lot of chance of that, but the stealers are now checking fuel specific gravity for evidence of gasoline in the fuel, so just a heads up on that one.


There are proponents and opponents of each...http://www.dieselplace.com/forum/smileys/Geek.gif


edit info:


I got so into the water question, I forgot about the lubricity and cetane boosters. That's several more pages, but I think the concensus would be that they won't hurt and may help increase the performance and longevity of the engine, especially lubricity agents for the fuel system components.Edited by: Zeeb

As usual another mechanic that is giving out wrong info. GM says Stanadyne is ok. Guys on this site use all types of additives. I'm sure they will chime in here.

I read the info sheet GM put out on addatives posted in the TSB section. Interesting that it does not cover 2004 http://www.dieselplace.com/forum/smileys/Unhappy.gif

Jim

People have been posting about the poor quality of fuel available in the states. From what I have been reading (and trying to interpret) is that running a quality additive will help. North America went to low sulfur diesel. Sulfur is what contained the lubricating properties in diesel fuel. The manufacturers should be designing engines to run on lower sulfur fuel, with no problems.
The gist seems to be that a fuel additive WON'T hurt. I run Stanadyne Performance Formula.
Also dirty fuel is a problem.
Hopefully more knowledgable people will chime in.

I too run Stanadyne Performance Formula here in S.W. Ont. because it is recognized by GM, is a de-emulsifier, adds lubricity, provides cetane boost and in winter prevents fuel gelling . 40,000kms/25,000mi and so far so good. I drain some fuel into a plastic bag from the fuel filter monthly and have yet to detect any water.


I add 2ml of Stanadyne per litre of fuel as indicated on DIC. Measuring the product is a pain and am still looking for that 'just right" measuring device.


It is my understanding that it is the process of removing sulfur from the diesel fuel that reduces the lubricity of diesel fuel. Sulfur in itself is not recognized as a lubricator.

http://www.dieselplace.com/forum/smileys/Clap.gifI put some questions to the makers of PowerService Diesel Fuel Supplement via their web site; their response is posted here with their permission. My thanks to Brian Wilson for taking the time to respond in detail and giving me the OK to post his comments here. I'm hoping that others here will gain a little more insight into fuel additives from his explanation. Please read from the bottom up to keep the questions and answers in order.
<DIV>Dear Frank,</DIV>
<DIV> </DIV>
<DIV>Stanadyne is the manufacturer of the fuel pumps for most Ford and Chevy Duramax diesel engines and they have a decent product. Stanadyne uses de-icers similar to ours to control water in the fuel system. Most additive manufacturers use a cold blender in the production of their product. They come up with a formula for a diesel fuel additive and then they send it to a cold blender that takes the formula, gets the chemicals, bottles the product and then ships it back for distribution. This increases the cost of production and makes the product more expensive. Power Service has its own facility, its own lab, its own tank storage and blending facility. We purchase chemicals at the beginning of the season which also helps reduce our overall cost of production. This is why we can produce the best products on the market and sell them at a reasonable price. Companies that use a cold blender have to estimate how many bottles of additive they will sell during the season. If the winter is severe and they sell out of product their season is over. On the other hand if we run out of product we just make more so we are not forced to estimate and make an entire season worth of products and hope we sell them. When we start to run low on a particular part number we just make more of it. This gives us flexibility that our competition doesn't have. </DIV>
<DIV> </DIV>
<DIV>It may be interesting to note that Power Service is the only additive company to have a direct corporate-wide program with International Truck and Engine Corporation. They buy directly from Power Service while every Ford dealership across the US has access to our products through their Blue Diamond Parts, LLC, which is a joint venture between Ford Motor Company and International Corporation. Freightliner and Mack buy our products directly from Power Service while Kenworth and Peterbilt buy our products through their PACCAR program. The largest fleets, such as Wal Mart and Werner Enterprise with mixed truck fleets, the largest coal mines and gold mines and everyday folks buy and use Power Service Products more than any other additive on the market. Our additives can and are used in every make of diesel engine on the market with excellent results. If you don't like our additives you will not find one that will work better. </DIV>
<DIV> </DIV>
<DIV>
<DIV>You are correct about the use of alcohol. It will take water out of the system, however there are good high grade alcohols on the market and there are some very cheap ones as well. Anhydrous IPA is a very high grade alcohol and at one time it was recommended by most engine manufactures to help remove free water from the fuel system.

Bump! No opinions????

I too run Stanadyne Performance Formula here in S.W. Ont. because it is recognized by GM, is a de-emulsifier, adds lubricity, provides cetane boost and in winter prevents fuel gelling . 40,000kms/25,000mi and so far so good. I drain some fuel into a plastic bag from the fuel filter monthly and have yet to detect any water.


I add 2ml of Stanadyne per litre of fuel as indicated on DIC. Measuring the product is a pain and am still looking for that 'just right" measuring device.


It is my understanding that it is the process of removing sulfur from the diesel fuel that reduces the lubricity of diesel fuel. Sulfur in itself is not recognized as a lubricator.

















Look here.


http://www.usplastic.com/catalog/default.asp


Type in Dispensing Bottles In the search feature

Heres the truth.......
Search the UNI air filter threads to find out who was right!

Now back to additives.......

My neighbor uses stanadyne (demulsifier) and I use primrose (emulsifier) and we both fill up at the same station.

His filters (cat/oem) were both full of rust.

Both my cat/oem were clean and shiny.

Stanadyne lubricity formula is a good choice if you just want to protect your injectors against "dry" sulfer removed fuel.

How is all of this additive business going to change when all of the refineries are going to be required to produce a low sulphur fuel? I've heard that most of them have the capacity to already, but since it's more expensive to produce, they're waiting until they're forced to. I talked to the manager at the Flying J in Oak Creek, and he claimed that since they have their own refineries, they're selling it exclusively in some markets.....Wi included. His comments were that due to the lower sulphur content, it kept the engine oil cleaner, but had just slightly reduced fuel mileage also. He claimed that he added additives as needed for cold weather, and didn't think that any more were needed, but the only way to be really sure would be to keep everything as constant as possible (fuel, oil, oilchanges, additives, etc.), then after a period of time, just do the math to see if there's any benefit. Who do you trust?