gearbox and differential oil change?
This is my 1st post here. I just read a TechTalk ariticle in Roundel (Feb 06 issue) regarding gearbox and differential oil change. Mike Miller strongly believes that both of the oils (in addition to the engine oil) should be changed after the break-in period. He does not trust the "lifetime fill" claimed by the dealer/BMW. Has anyone done or knows how to change the oil for these? I don't suppose you can go to the dealer and ask them to change under warranty.