Automatic Transmission Fluid - Lifelong or NOT?
So my bmw x5 has 87,000 miles on it. . running well. no problems. went it to get oil changed today and discussed with my nice german mechanic Hans topic of automatic transmission fluid.
He thinks better NOT to change it ever as it is "lifetime fluid" but then he said "nothing is a lifetime."
I called BMW and their service people said "you shouldn't change it until earliest 100,000 and even then there is the risk that you can have problems with transmission after your change it .."we warned you"
Looking online most blogs say you should change it every 30,000 and the whole "lifetime transmission fluid" is a conspiracy by BMW ("whose cars are high maintenance but they now don't want people to think their cars are such so they are using lifetime fluids") to sell more cars ...and also conspiracy not to change fluid so that mechanic ends up doing transmission work later on in life..
THings online talk about flushing the system which makes sense but even then you may move "sludge" around from a place that it was not causing problems to a place that now is causing problems ...
What do you think? Surprisingly Hans and BMW dealership said not to do it .....................
Your thoughts are always appreciated. The car is paid off so I'd like to keep it as long as possible...