WoW, this is a major discovery. The kit is definitely worth it. The oil in the kit comes to less than $7 a litre. The OEM oil is normally $17 a litre. I am getting the kit when I change my filter. Too bad they don't sell the oil separately for that price too.
EDIT: After reading this discussion http://www.e90post.com/forums/showthread.php?t=363648
I think I am sticking with my Castrol Multi-vehicle ATF that I used for this DIY.
If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger