Robere, I have been using the Stanadyne Performance (Blue bottle) for the last 3 years. I would recommend this one. YOu can check out the complete line at
http://www.stanadyne.com/dsg/dsg_dfa.asp
Click on the link '99506 Which Additive is Right for You?'
This will give you a side by side comparison of the various products they have. To answer your question specifically, the additive you choose should fulfill all or most of the attributes described at least as far as the Cetane improver advantage is concerned...
good luck /images/graemlins/smile.gif