Thanks for the location. I also have a bevy of bimmers. The 530xi touring doesn't have the same problem with the crankcase but i notice that the engine bay must be better insulated because I the engine stays warmer longer after i shut it off. This may be the reason
I will contact the Castrol Rep to see where i can get the 0W 30 and post it to you if I find a better source What was the cost at part source?
I only encounter the problem when the temperature hits minus 20. Wonder Why??