I just did a search on this forum about oil levels. There are two pages worth of threads that mention this issue.
The longer I own this thing the more I shake my head. If an owner can't figure out how to check an oil level properly (and this pig burns oil like no modern motorcycle ever should meaning oil levels must be checked often and accurately) then it seems to me there is an engineering/design issue or at least a complete disregard for the customer by BMW.
BMW makes a nice-looking bike and the low CG is appreciated, but it's designed like a 1950s era John Deere tractor (farmers called them a two-popper) without the ease of maintenance and repair the tractor has.
My apologies to the BMW fans out there, but I regret the purchase of this bike and I'm stuck with it for the foreseeable future, at least until something major goes wrong with it (and I'm guessing that will happen eventually, based on what I've read).