Originally Posted by swamp2
I have been a full synthetic and change it every 5k mi guy in the past. I am leaning toward sticking with that but do also believe BMW knows something. They are, however, in a bit of a conflict of interest position as they have to pay for the maintenance for the first 50k mi so it is very much in their interest to minimize their costs associated with this. I think oil changes every 7500 unless tracked might be my compromise.
I think the free maintenance is only available in the US market -- might be available in a few others as well. I could be wrong about this though. Regardless, I don't think BMW would risk their global reputation just to save a few bucks on maintenance outlay in a few markets.
Naturally there's no harm in changing oil more often than prescribed, but I just don't want the hassle. If the manufacturer says I won't need an oil change for 15K miles, I'll take the peace of mind and enjoy driving every one of those 15K miles.