I wrote to Power Services the below e-mail:
Hello,
Could you please tell me if “Diesel Fuel Supplement +Cetane Boost” is an emulsifier (disperses water in the fuel) or a demulsifier (removes water). The bottle says that it disperses water in fuel. I currently use in my Duramax diesel and there is some debate in the GM diesel on-line community regarding your product and I would like to definitively clarify it.
Thank you,
Steve
Their response:
Dear Mr. xxxxxxx,
<DIV> </DIV>
<DIV> GM just recently issued a Technical Bulletin warning not to use any product with alcohols or emulsifiers. Emulsifiers are chemicals that pull water up into the fuel, or suspends the water in droplet form in the fuel. Emulsifiers will cause fuels to look cloudy. Alcohols can adversely affect lubricity and the cheaper alcohols can damage pumps and injectors. In the winter months when the temperature drops below freezing, these water droplets can freeze on the filter face of the water separator causing the flow of fuel to stop, even though the fuel is still liquid. It does not take much water to cause Fuel Filter Icing problems. Ford has also come out with a Technical Bulletin not to use any alcohols but I have not seen any reports by Ford on emulsifiers. </DIV>
<DIV>
Demulsifiers will cause excess water to fall out of the fuel. This water will fall to the bottom of the fuel tank or fuel system and can cause corrosion, rust, reduced lubricity and in the winter months it can strip antigels out of your fuel. Also, there are about a dozen demulsifiers or de-hazers on the market. None of them will work on all fuels. They are fuel specific and when an additive company says they use demulsifiers in their additives it is for advertisement purposes only. If you talk to any Chemist that knows anything about demulsifiers they will tell you the same thing.
Our Diesel Fuel Supplement contains a deicer that is intended to keep the water in the fuel from falling out. Warm fuel will carry more water than cold fuel. When it gets cold some water can fall out of the fuel, or the water separator can squeeze out this water which can freeze on the filter face and cause the fuel from flowing through the filter even though the fuel is still liquid. This is call Fuel Filter Icing and is often mistaken for fuel gelling. The deicer can also help to pick up small amounts of water in the fuel system. If too much water is in the fuel tank it can overpower the deicer in the Diesel Fuel Supplement.
Our Diesel Kleen is a summer additive and it is intended to give you the very best injector cleaner, cetane, lubricity, fuel stability package and corrosion protection. It will not do much for water.
There is a lot of misinformation<S