Dergside - You're not exactly the run of the mill BMW owner looking for a cheap way to tick the box of owning a BMW with a nice get out clause at then end when they decide they want a change. I'm talking about the average Joe who wants a car that goes A to B but when buying got it into their heads that they wanted a BMW.

I think you need to look at the chain as a serviceable item on them anyway. Theres not actually been a confirmed fix on them. I would think more regular oil changes would help though. The service interval on them is far too long.