cetane

Hello everyone, Has anyone ever used a Cetane Booster mixed with a tank of Diesel? I have used Wynn's Diesel Booster and noticed a significant improvement in acceleration and torque. I would like to dyno my car like this......just to check if there ARE any gains :D Any thoughts? :)

There has been lots of posts on V-Power vs Ultimate etc. However to save me approaching Shell for information I wonder if anyone already has it....................I've been using V-Power Diesel for sometime now, however I have got to spend a few months away for work where there is only Shell...