[kbsilver]

Car is a later 2011 335D with 53K on the clock. It threw an SES Code for minimum adaptation on injector #2 with an associated occasional misfire at idle. Running the car hard cleared up the misfire and the SES went out on it's own. It essentially seemed to run fine (with some minor exceptions). Brought the car in anyway and it was found to have CBU. BMW took advantage of having an example so close to corp headquarters sending down some field engineers to carefully capture engine parameters before cleaning.

Had the walnut shell head cleaning and intake replaced (not cleaned as per engineering instructions). No injectors were or ever have been changed on the car (I've never used any fuel additives). DDE program updated (they may still be tweaking the program). The car was driven (I gave permission for a tech to take it home for the night) to be put back on the computer the next day for measurements and resetting the injector zero adaptation values.

Observations:
-Car runs great
-Butt dyno says it's running stronger
-Turbo lag seemed to be less noticeable after cleaning
-MPG is back! Will test soon on a trip but seems to be 10-15% better
-Idle speed in gear is about 75 RPM higher

In the end BMW took very good care of me, workmanship excellent, visually does not appear to have been worked on. The only issue is this will likely happen again as I do not think anything has really changed that would prevent it. And next time would be on my dime. But as the best driving car I ever owned, is probably worth it.