Hi folks,
I've got a BWM 540i/6speed. 135k.
I've always run Mobil 1 0w40, but I'm considering trying out the M1 High-Mileage synthetic.
http://www.mobiloil.com/USA-English/MotorOil/Oils/Mobil_1_High_Mileage_10W-40.aspx
Site says it's has a higher level of detergent plus seal conditioners...