93oct. and stock otherwise, MAPs 4 and 5 is the way to go. If BT within reach and not too hot you can give MAPs 6 and 7 a try.
Retired: 2005 N52 E90 330i Sport 6AT
Retired: 2007 N54 E92 335i Sport 6AT
Current: 2012 M57 E70 X5 xDrive35D