Thanks for the replies.
ARD, funny you mention the EDIBAS/INPA BMW software, I just ordered the cable and I installed the software yesterday, now I got to learn how to use it, good thing there is a website (bmwcoders) to help with that.
JCL, I have read a lot on all the various engine/fuel additives, and there is good and bad reviews about all the different snake oils. I have used them for years on 3 bmw's with no adverse effects. Funny how they make my car run better/smoother until it is out of the system. Hard to believe that BMW has that delicate of a system where it wont allow us to add fuel additives without ruining the fuel system. If that were the case, I'm sure we would hear a lot of complaints.
I haven't yet tried Techron, I will try it and let you guys know how it works out.