Originally Posted by calicolorado
There is no way BMW could convince me that a "Lifetime Fill" fluid is appropriate to a motor vehicle. It's not possible.
I thought I read somewhere in the service manual that "Lifetime" fluids = 100,000 mile change interval.
I also recently changed the pan and fluid on my car when it reached 100,000 miles. Can't say I noticed a big difference, other than being relieved that it was done
I'll be doing the rear diff in a couple of weeks.