i have heard that only bmw dealers carry the specific castrol tws oil recommended for our cars...and my dealer does no favors and charges the highest prices i have ever seen for just about anything...i'll keep looking.
2011 e92 m3 space grey, dct, tech, prem, etc
specialized carbon stumpjumper s works fsr
trek madone 5.2
nikon d4, 14-24, 24-70, 70-200, 500vr