UPDATE.

Been a whole month now on mostly octane 89 and no misfires to speak of, however it has been an unusual and rather mild February in my neck of the woods....

__________________
E39 528i 1998, 5 spd black, 350Kkms and going..with new owner.
E60 545i 2004, 6 spd steptr. mystic blue, Tom Sellick's old car, Adaptive steering, Adaptive Xenons, Anti dazzle mirrors and FAST!!!, BT&Aux+SB Chime+Dig speedo+iDrive discl. Coded