Like Tim I have read a bit about Ultra Low Sulfur Diesel (ULSD) on the 
internet. Below is a web site address. It includes an article written in 
Aug 2007 that gives a good overview of what ULSD is and why the use of 
additives are advisable. 

The site includes the results of tests done to determine the effectiveness 
of additives. They not only tested legally registered additives but two 
stroke oil and used engine oil as well. Now why the heck would they be 
testing them? (BTW, two stroke engine oil scored better than the additive 
I buy from GM. That's another weird thing, GM dealers sell diesel 
additive, they just won't officially recommend you use it in their 
vehicles). 

http://inchoate.harm.org/~halbritt/dodge/Diesel%20Fuel%20Additive%20V3.pdf


  Ted

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