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.
2015 M235i, MW/Bl, all packages
2012 x3 m sport, carbon black, prem, tech, conv, etc
evil the following 29'er, specialized carbon stumpjumper s works fsr, trek madone 5.2
nikon d500, d810, d750, 14-24, 24-70, 80-400vr, 500vr