This does not in any way negate the argument that under heavy use, changing the fluid at 30-60,000 mile intervals is a good precaution. Color is but one indicator and could mean nothing or it could mean burnt fluid: http://www.agcoauto.com/content/news/p2_articleid/141
Originally Posted by BMWTurboDzl
Color means little. Wrench boredom is a sickness which we all suffer from it to some degree. Hell I like to change my oil every 6.5k miles. I know it's probably a waste but I just like doing it.
"Hello, my name is John and I am a wrenchaholic". "Hello John! "
Just trying to keep people informed.
Sent from my MB525 using Bimmer App
Good information includes lack of cynicism and respect for real data. Anecdotal data is useless in this respect, but case studies such as incidents of burnt fluid and transmission failures at lower than "forever" mileage are eye-opening. Until there is solid data, we will need to depend on BMW to provide us with recommendations. Heavy duty use is a point that is a judgement call which your cynical comments seem to ignore. Certainly most of us don't baby our cars and this would not be recommended anyway for the common diesel motor which seems to do better with full load.
I believe its also very reasonable to do UOA on the transmission fluid for these ZF boxes to know when to service them.
Here's another similar point of view saying 50,000 mile changes: http://blog.bavauto.com/11194/bmw-di...ce-auto-trans/
I'm done with this thread. Thanks for your point of view.
Rose Castorini: I just want you to know no matter what you do, you're gonna die, just like everybody else.
Cosmo Castorini: Thank you, Rose. - Moonstruck
Last edited by Pierre Louis; 11-14-2012 at 09:38 AM.