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
2012 x3 m sport, carbon black, prem, tech, conv, etc
specialized carbon stumpjumper s works fsr
ibis mojo sl, xtr, trek madone 5.2
nikon d750 (2), 14-24, 24-70, 80-400vr, 500vr, 16mm fish, 28-300vr